The 3 Most Common Engine Problems >> Engine knock can be caused by many things, however, some of the most common are as follows: The fuel in your car has too low of an octane rating. My theory is the ignition timing is dropping too quickly upon full throttle acceleration (taking off with my clutch, and putting load on the engine). A similar size/weight gasoline engine may be much more powerful, and have a better power to weight ratio, but it's not as efficient. If i had to guess it is pre-ignition pinging. Ever since the new Ultra Low Sulfur Diesel Fuel came out my engine has been making a knocking, rattling, or pinging sound when under light load and accelerating. Unfortunately, if you’ve got rod knock, the only answer is rebuilding your motor. This means that at 2500 rpm your engine has to work twice as hard to do the same work as it will at 4000 rpm. Not comfortable with that procedure. That should richen it up a little. If you feel a shaking (rather than hearing a pinging problem) that is more like a misfire. Retarding the timing will cause the engine to cool down a bit and stop the pinging. Although the Seven Marine engine claims to have higher fuel efficiency, there is still a requirement to have a minimum of 89 octane and 10 percent ethanol. If you have some spare parts,. In these pages, I talk about the various mods needed to take the Toyota 4AGE 1600cc engine from as low as 115hp all the way up to 240hp in 10hp increments, and beyond with turbos. Toyota will recall a total of 90,000 Lexus and Crown sedans in Japan, and is “making preparations to take similar, appropriate actions” for 180,000 more cars that carry the same engine worldwide, said Paul Nolasco, a spokesman for the automaker in Tokyo. At wide open throttle, between 4,400 and 4,800 rpm, Mercruiser’s 1,040-pound 3. It is much more noticable under light and moderate. 87-91 is all have. In some cases the pressure rise can be so great that it causes an audible pinging noise from the engine. Fuel injected engines use a dry flow intake manifold that doesn't have the benefit of the vaporising fuel for cooling that a carburettor has. I guess due to my rather heavy right foot, I haven't had such problems. Once the engine reaches 1700 or more RPM very little to no pinging with normal driving engine load. The overlap happens at the end of exhaust/begining of intake cycle and actually raises the compression at some point in the RPM range. Advancing it made it go away. Injector Specs: Static Flow Rate @ 43. Running 87 octane with 16k miles on the 3. Maybe you are riding that bike at too low rpms. The MR2 Owner's Club of New Zealand. another possibility: the engine in your car is a B230f, which is notorious for piston slap. On world models, idle speed is 950-1050 RPM. Have you pulled and cleaned the pilots? Could it be piston slap rather than pinging at low RPM? At what RPM do you usually experience the problem? How many miles on the engine?. The detonation will also occur if I floor it in a high gear at lower RPM and labour the engine. When I switched back to 87 it started pinging again. Engine pinging also refered to as pinking, detonation or knocking Pinging can be anything from a loud knocking noise to a soft tinkling sound that is emitted from the engine. Run the best unleaded fuel you can. Thanks ! Mike. , but doing so hurts low speed torque which is not recommended for street engines or cars with automatics. Car is serviced at dealer, but before I donate my $1000 this time Id like to know what the issue is. Its in the background a bit as i'm speeding up. If ac is on it happens more frequently. 3 engine’s distributor is not adjustable and is locked in place. "Pinging" is the metallic rattling sound an engine can make when accelerating. A few thoughts come to mind: 1. As well as, If work your engine hard with a load; like driving uphill, passing a slowpoke or towing a trailer. A similar size/weight gasoline engine may be much more powerful, and have a better power to weight ratio, but it's not as efficient. High rpms detonation is not as strong, more like short bursts. Take a few minutes to make sure your engine is idling smoothly at a comfortably low rpm. The injectors are completely off when desired rpm is under the actual rpm, IE when your coasting. Enter the designation of displacement, 1 for cubic inches or 2 for cubic centimeters. Unfortunately, sometimes this results in a little pinging or spark plug knock. 5: Detonation ("Spark Knock") Detonation, often called pinging, is nothing less than a series of small explosions that take place within an engine's combustion chambers. Seems to be getting worse. Prior to that time I only occasionally noticed pinging on a hill when I pushed. 4L 3v Engine Knocking Noise: This is Why You Don't Buy Cheap Engine Parts! - Duration: 10:15. (old ones came out nice and clean but 2 of them looked like the pinging hurt the tips a bit) The new plugs didn't get rid of the pinging. The truck. low RPM load equates to detonation and pinging, will eventually crack the ring seats on the pistons if you keep it up. The engine did heat up about 3/4 on the temp gauge due to the radiator being pretty low but it did not overheat. another possibility: the engine in your car is a B230f, which is notorious for piston slap. The boat is 6500 ish loaded and with a 17p 15. So much so that I have to downshift to pull the car ahead, else the jerks are very pronounced by then. Check out the three most common causes of engine knock: 1. At low RPM (above idle to approx 2500RPM) I'm getting a bucking or surging. My 99 f150 v6 auto transmission has some ping or detonation when at low RPM and slow speeds. It is not coolant, I presume it is dumping too much fuel. Later exhaust valve opening helps low rpm performance by keeping pressure on the piston longer, and it reduces emissions. Since that first day of testing we have tested Race-Gas against everything from 98 octane to 116 octane distilled racing fuel and in engines as large as a 550 CI at 13. Any suggestions on the cause of anything I can do to alleviate the pinging? My '04 1150 GS pinged with hard acceleration from low rpms in hot weather from the day I. Take a few minutes to make sure your engine is idling smoothly at a comfortably low rpm. Another source of pinging is a carbon buildup inside your cylinder heads. At some point, while the piston is still going up, the fuel spontaneously ignites. Once the combustion chamber is "fouled", it doesn't matter what you put in the tank, the engine is going to ping. Pinging is that high pitch ringing sound that an engine sometimes makes when the throttle is opened with the engine under load. I changed to a cooler plug (NGK Iridium) but it didn't change much. For example, my neighborhood is very hilly. That’s why at higher RPM’s the rattling subsides. SYMPTOM SUMMARY The engine "pings" or knocks on acceleration. The car seems most unresponsive to acceleration when the engine is running under 2 RPM's, though trying to accelerate causes the same reaction from the engine at nearly any speed/RPM. The detonation can prove to be fatal as well and will require you to rebuild the engine. 4th gear im on the freeway and cant hear it that well and 5th, well i would be doing over 100 to find out!. Heavy carbon buildup will be indicated by higher than normal engine compression pressure readings. Sounded like pinging to me but not sure. It will also do this at times when I stop at a light or stop sign. You can google Atkinson cycle to see what is done. After that, I was able to use 87 octane for about 2 years without any pinging. your rpm range doesnt indicate ping--typical ping is more pronounced on low end lug. At low RPM (above idle to approx 2500RPM) I'm getting a bucking or surging. Gauges would zero out when accelerating from a low RPM. Injector Specs: Static Flow Rate @ 43. When an engine pings, it releases pollution into the environment in the form of nitrogen oxide (NOx) and raw, unburned hydrocarbons (HCs). This only happens with 87 Octane, as what is the standard rating to use. Toyota will recall a total of 90,000 Lexus and Crown sedans in Japan, and is “making preparations to take similar, appropriate actions” for 180,000 more cars that carry the same engine worldwide, said Paul Nolasco, a spokesman for the automaker in Tokyo. Retarding the timing will cause the engine to cool down a bit and stop the pinging. The low speed hesitation could also be attributed to the inherent bad fuel/timing maps built into the ECU from the factory. FYI - 98 octane is "above" the normal fuel level here in Australia. 4 HP @ 4600 RPM. Solution, changed brand of oil used in the engine from Valvoline to Royal purple or Nissan Easter oil 5w-30. I have a 99 1. In some cases the pressure rise can be so great that it causes an audible pinging noise from the engine. It comes out of the hole really good and will old a plane down to 17 mph in rough water. > >If I give it a little gas, it does just fine. When climbing any kind of grade (usually offroad) at low rpm truck starts to ping and miss and spew out more white smoke than any person could imagine. If this timing is mis-adjusted it can cause low power, poor gas mileage, engine detonation (pinging) and backfiring through the intake or exhaust system. The shift interupt switch kills the engine for a second to help take away load when shifting into neutral. If your engine has a ratio between 8. The most common diesel engine problems that require repair include: Diesel Won’t Start Hard To Start Diesel Engine Diesel Runs Rough At Lower RPMs Lack of Diesel Engine Power Diesel Engine Knocking or Pinging Black Smoke White Smoke Blue Smoke 1. If I give her more gas or get up to 55mph the sound seems to go away completely. Once I get over 3K RPM, all is good. In the morning I don't really hear it leaving for work. Jet engines require high RPM to achieve satisfactory compression ratios. When put a slight load on the motor, like going up a bit of a hill, it starts to ping quite a bit as soon as the converter locks up both in 3rd and OD. Engine runs great under heavy acceleration. I bet at least one of two things is happening: your cam (which you didn't mention either) bleeds off a ton of pressure and/or you don't actually have 12. Now it's getting louder and more noticeable in all gears when accelerating and when low RPM for the individual gears while moderate acceleration, like going up a small hill. Initial+centrifugal timing is 25 degrees at 2000. I've recently purchased a Q7 3. Listen to the exhaust. • “The Warning audio tone shall be three “pings”, each ping being the same as the Caution audio tone. The idle speed is too low. It makes the transition from first to second gear (M46 with awfully wide ratios) much better. My 98 Vortec 5. A similar size/weight gasoline engine may be much more powerful, and have a better power to weight ratio, but it's not as efficient. "Pinging" is the metallic rattling sound an engine can make when accelerating. use detonation (engine ping. MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Toyota - Corolla :: 2001 - Loud Spark Knock / Engine Pinging Noise Under Acceleration Oct 13, 2015. Take a few minutes to make sure your engine is idling smoothly at a comfortably low rpm. 5L engine is the same basic design, DOHC single sparkplug of the E350 variant in the M112 family. Mine will happily chug along at 5-600 rpm. Sounds like an engine with the timing way off. It is coming from the engine as the noise goes away if i play with the throttle. It's hard to hear, but there is definitely a repeatable noise coming from the motor. I have had the Nissan dealer look at it, ran high octane fuel, retarded timing back 2 degrees, cleaned intake mani …. Lack of high-octane fuel was a major problem for the M-block 400. temps heated back up in houston today into the low 80's it seems that anything over 70 degrees causes this ping or tick at high speed RPM to return. Run the engine at each RPM/Load on a dyno, advancing the timing each time to see where you get the most torque, short that of any pinging. However low RPM also gives your engine longer periods of time to detonate and knock. I pumped all of the gas out of the tank and put in 5gal of 110 leaded and 17gal of 91. Make sure your timing curve doesn't start until at least 200-300rpm above your engine idle and that's it. For example, during the late '70s and '80s, pinging during normal operation was common with carbureted engines. Getting an easily audible standard valve pinging sound when the engine a) has fully warmed up and b) is receiving increased throttle at lower RPM's (< 2K). Set engine speed to over 1200 RPM (if noise is a VCT knock, the noise should disappear). The 2009 Ford F-150 has 12 problems reported for engine clatters like a diesel at low rpm. Engine runs great under heavy acceleration. Start engine. Now temp doesnt seem to matter Hyundai is stumped and sent a flight recorder to record exactly what is happening. Forums > Engine Specific Tech > 96-04 - 4V Specific > Chasing that annoying 4V "Rattle"again Discussion in ' 96-04 - 4V Specific ' started by Wild Horses , Nov 9, 2016. Each engine will behave differently. An engine with a long-duration cam will experience a significant loss of low-end torque unless the corrected compression is matched to the cam timing, specifically intake valve closing. "Pinging" is the metallic rattling sound an engine can make when accelerating. If I just drive easy - no pinging. Â what causes this is an imbalance in air pressures, when it shifts it goes from 17-22 psi to like 5-8 psi and on the garrett turbos it causes that sound. Fast-forward to the 1960's and high-compression 350-horsepower Corvette engines howling at 6500 rpm; suddenly the spark timing equation is much more complex, and spark timing errors can. I changed to a cooler plug (NGK Iridium) but it didn't change much. Even added BJ44k. I will come to a stop and my truck with start spiking and dropping RPM's. 5ish (all at 750 rpm). it's a little 10mm screw with black cap looking thing on the throttle cable, most likely under your front storage compartment the 99-02s have a TPS on the throttle cable gizmo and when I tightened mine, i went from 6,100 RPM wide open to 6,800 RPM wide open (Solas). I have read a lot of topic on this issues but there were virtually no information on how to cure this problem; ERRATIC IDLING on Proton fuel injection cars. 1991 deville 4. In the meantime, ride it gently so that it isn't pinging - keep pinging a lot and you will damage the engine, expensively. RPM LIMIT This distributor is equipped with an adjustable rev limiter. No crankcase atomized oil would get into the intake and the smoke and pinging would go away. Now i know it shouldn't be that high. thanks in advance to any help!! oh and i also changed it from normal to economy if that matters. I think it is "pinging", I'm sure if I let my SC get down to 2K RPM in 2nd and then accelerate hard it will ping. There are no DTC's. During some spirited driving, not near readline, flashing yellow check engine icon came on for about 10 seconds, then went off. _____ If a water cooled engine cools its water with air, isn't it just an overcomplicated air. In the main working range, the speeds range from 1100 to 1500 rpm, which is gentle on the components and lowers consumption. 5k rpms or so while you poke around and listen under the hood. Any advice where I should begin looking would be appreciated, Im going to do a compression check on it and check the base timing although there should be no reason for it to have changed. My 2003 GMC Sierra 5. To start with, there are basically four types of 4AGE engine -. A rod knocking, (bearing letting go) will have a low thud or pounding at low RPMs and oil pressure will drip. Or run it up a hill, again in 5th gear at low rpm, you should also hear a loud ping. low RPM load equates to detonation and pinging, will eventually crack the ring seats on the pistons if you keep it up. i have seen a piston. I was on the super slab today and had a clear stretch so i opened the V11 up in sixth gear. The engine should show an initial idle speed of around 900-1100 RPM and then slowly diminish to 600-700 RPM unless the air conditioner is on in which case it will run at around 800 RPM. 0 tdi engine noise at 1800 to 2000 rpm. At lower engine loadings during part throttle or low RPM, detonation may be warranted. If that does not get the bike idling you may have either a blocked idle jet in the carby or low fuel levels in the bowl. Proton sell the Throttle Body unit for. As said in manual: Your Yamaha engine has been de- signed to use premium unleaded gaso- line with a research octane number of 95 or higher. When the driver tries to restart the engine, it cranks for a long period of time before eventually starting. I would agree that a slight, occasional ping at low RPMs is not a crisis. During the break-in period the ECM will automatically limit engine RPM in 2 stages during the first 20 hours of engine operation. Enter the anticipated maximum safe engine RPMs, typically known as red line. The pilot jet is not difficult to set. It happens a few times an hour while out riding, and today it happened a couple times in a row when I was low on fuel. does the car have a timing adjuster or chip and does it do it in all the gears or just one ? mines does it in 5th under 1500 rpm if it`s real bad don`t drive the car it sounds like detonation and can destroy the engine. Amsoil Motorcycle Octane Boost 4 FL OZ Engine Ping Eliminator Maximizes Power & Performance When treated at 1. No rebuild. 5ish (all at 750 rpm). the idle is normal but pings with light throttle at 1200-1900 rpm cruising speed. thanks in advance to any help!! oh and i also changed it from normal to economy if that matters. Each engine will behave differently. Bring engine oil temperature to 160° F (71° C) or above as indicated by the scan tool "EOT" PID. Run the motor rich to start for the first 2 tanks on the bench or on the ground. Newer Computer-Controlled engines, trying to make the last bit of fuel economy, have a piezo vibration sensor on the head, which listens for 'ping' and backs off the ignition timing advance. However, under fast steady acceleration, no pinging or knocking. He attempted to"relearn" the idle but failed. it's NOT healthy for the engine. Jet engines require high RPM to achieve satisfactory compression ratios. I have a Subaru 2011 2. Spark Decel vs. I have the problem of knock in my engine when accelerating. Now, there is a low rpm knock in the engine. hours of operation the engine rev limiter is 4250 RPM. It does not specify what high and low engine speeds are considered to be. I own a Wira 1. There's a hard knock when you use 87 and run the RPM too low. This problem however cannot be timing chain related, and I tell you why: there's no pinging when in Neutral, at any RPM. Diesels are low-rpm workhorses, with no ignition system to break, with internal engine parts designed to tolerate high compression, with less wear/friction as a result of lower rpms, and all associated parts (belts, pulleys, etc) experience hundreds of. Engine Ping I have a 2002 R1150RT. Maybe you are riding that bike at too low rpms. It has a pinging noise from the engine when accelerating from a stop. Covered for 8 years or 80,000 miles. If this happens enough in a certain RPM area or gear, the computer will "adapt" and it will learn to pull timing in this area and just incorporate it into your tune. If you use the lower gears (2nd or 3rd), going up a hill will put a good load on the engine. Here are the specs. MG Midget and Sprite Technical - 1966 1098 engine 'pinging' problem. This cam will change your engine´s personality. As your engine speed or RPM increases the faster you are away from the moment your engine compresses the mixture. It usually occurs when the vehicle pulls away from a stop and the engine is under a load. FordTechMakuloco 493,684 views. I have noticed the engine pings when I accelerate hard, from most any RPM. 0 tdi engine noise at 1800 to 2000 rpm. But if you maintained that much advance with a full throttle and low/medium rpm, the engine would ping/detonate, a problem which can destroy an engine if not corrected. This can result in detonation which produces a pinging or a knocking sound. 4th gear at 1500-2000rpm) pinging is not good for an engine so i would like to fix this asap. TORQUE is what makes the car go. I get the pinging on warm days at low RMP under load. But if i run a high volume of race gas, it will stop the pinging. Specially for 2003-2009 Legacy (BL), EJ202 engine was improved: it uses lightweight cylinder block with lightweight sleeves, modified intake manifold and 4-2-1 headers. It is designed to improve startup performance and eliminate engine ping and knock for increased power at low-rpm operation. Return the engine speed to idle and verify if the knock returns. The low throttle settings are, +20% and the high throttle settings are +35% and +40% at 4000 RPM and up. I got a C230 rental and its 2. i might add that my CEL is on currently for a knock sensor issue (water in the intake) but this problem has been happening years before the CEL came on. Consumers have differing opinions. I have since calibrated my speedo, replaced the stock paper air filter with a K&N, and used my Flashpaq 5. , it pings if I try and get on it at lower rpm's. The injectors have a loose pin in the nozzle to help atomization that you can clearly hear when accelerating at low rpm. However at about 1800 to 2000 rpm then engine sounds a bit harsh, like a resonance type noise. My 95 always used to ping when using 87 octane so I used 93 octane for over a year and the pinging stopped. After taking a look under the hood, I noticed that when the engine can be seen shaking a great deal more than it should, literally jerking itself back and forth. Kia News Room. A random misfire code usually means the air/fuel mixture is running lean. The boat is 6500 ish loaded and with a 17p 15. Sounds like an engine with the timing way off. Improves Low-rpm Performance Engine knock is. will engine ping at under 2000rpm cause engine damage? i just changed my tune with an sf3/x3 from 87 octane to 93 octane. I also assume that higher spark voltage causes faster spark plug wear. Once engine hits 2200 RPM no pinging under the heaviest engine load. At low boost and when the engine is cold, the engine is essentially a naturally aspirated engine real loud rattle. On the way home pinging started at 2800 RPM. I have had the Nissan dealer look at it, ran high octane fuel, retarded timing back 2 degrees, cleaned intake mani …. Do this with temperament! It takes time to get used to what you are seeing as well as if it is actually helping. Return engine speed to idle (verify knock returns). I think it could be one of two things: my intake manifold or rearend gear ratio. A tapping at the top of the engine could be a problem in the valve train someplace. With timing set At 8 degrees before TDC and idle adjusted to 650 motor runs goodon. If a car is pinging at low rpm and high load on 87, I wouldn't be too surprised since the tune is being "dialed back" in all areas to keep knock at bay. This cam will change your engine´s personality. You can also run the engine at a "steady-state" RPM of say, 2500 RPM to double-check your secondary mixture screw settings. The fix: Check fuel pressure with a fuel pressure gauge. Most Airhead engines have a potential pinging "zone" from idle rpm to maybe 4,000 rpm. The Causes of Internal Engine Knock, and How to Eliminate it. HorizonsUnlimited. @ 2692 RPM vs. It is not coolant, I presume it is dumping too much fuel. Most engines nowadays pull in upwards of about 19 or 20 inches of vacuum and nice and steady at idle. If the engine is modified, operates at high RPM, under heavy loads or at high temperatures then, a colder heat range spark plug will be necessary to help prevent detonating or pre- igniting. 14200 mi: HIGH SPEED / RPM ENGINE CUT OFF BUT ONLY WHEN OUTSIDE TEMP IS OVER 105. I had the Mass Air Flow sensor cleaned; maybe they - Answered by a verified Nissan Mechanic. Joined Jan 18, 2013 · 38 Posts. Is your pinging under load such as up a hill or very light load at low RPM? If it is the latter it won't be pinging. Any ideas? Discussion in 'VB - VK Holden Commodore (1978 - 1985)' started by Just seemed unusual I thought pinging was usually found up hi rpm not low. I have an 09 impreza with a naturaly aspirated stock 2. Re: tinny pinging sound when accelerating (ninetyseven) 06-27-2002 01:25 PM #2 if it is the cat it could produce some damage. My 98 Vortec 5. A start retard amount can be selected to aid in cranking. I changed to a cooler plug (NGK Iridium) but it didn't change much. Improves Low-rpm Performance Engine knock is. {R-108578}” • “The Low rotor RPM tone shall be a unique continuous low/high/low warble. Low readings could also be very late valve timing or worn piston rings. Sounds like an engine with the timing way off. I get the pinging on warm days at low RMP under load. Re: Engine Knocking on Reducing RPM Reply #8 on: April 27, 2013, 03:45:23 pm My 96 started doing that at about 50-75 miles. I started using 89 gas on hot days and the pinging seemed to go away. Even with the gauge at "3" it still pings *IF* engine temperature is above 90*C. Note: Excessive spark advance will cause knock (detonation, pinging) and lead to severe engine damage. I agree in my experience the standard ULP fuels in Australia 91octane have my c50 pinging at low rpm and high temps. 2004 GT with SCT Tuner ping at low RPM's. It generally happens during lower rpm operation during low/moderate load. You can also run the engine at a "steady-state" RPM of say, 2500 RPM to double-check your secondary mixture screw settings. Check the throttle cable adjustment screw. 5l SOHC engine with 10:1 compression. It seems prevalent at all engine temps, and is most noticeable on the drivers side. I have an 09 impreza with a naturaly aspirated stock 2. @ 3000 RPM, and Engine B supplies 200 lb. So I have the servo kit changed (2 times in fact); but no good at all. Seems to happen at high ignition advance, no codes for the knock sensor. anything above 2. I'd think alcohol would prevent pinging, but might lean it out too much? Swap out the K&N filter for a stock filter. People cruise on the freeway at 4-5000 RPM. When the engine is first started after a long period, it will exhibit an engine rattle noise when letting of the gas pedal between 1500 rpm to 800 rpm and sometimes when slowly accelerating. Enter the volumetric efficiency of the engine. the engine also tends to overheat at high speeds regardless of a good cooling system. No PCM codes, no cooling issues. He mentioned something like, not more than 1/2 throttle til pass 2x Idle?. The truck. There are lots of reasons as to why there would be engine knocking. Toyota - Corolla :: 2001 - Loud Spark Knock / Engine Pinging Noise Under Acceleration Oct 13, 2015. Most people associate low RPM with being easy on the motor and in most cases they are right, but low RPM also equates to longer windows of time for detonation to occur. The fix: Check and repair the cooling system. During the break-in period the ECM will automatically limit engine RPM in 2 stages during the first 20 hours of engine operation. An engine designed when 102-octane high test was at almost every fuel station in the country being forced to run on today's gas means that ping has become an all too common companion, and what if. Craig, I am wondering if your distributor has the proper flyweight springs for your modified engine. Check out the three most common causes of engine knock: 1. Run the engine at each RPM/Load on a dyno, advancing the timing each time to see where you get the most torque, short that of any pinging. An engine with timing too late (retarded) will have a low idle vacuum, have slow throttle response, feel like a turd at low RPMs and will run hotter than normal. Here's a short video. On many older two-stroke engines the spark voltage is very high (and not well regulated). for a typical 145 pis engine, you may get 180 psi readings in all cylinders if a lot of carbon is present on the piston tops. Engine spark knock is usually heard during moderate to heavy engine acceleration. Proton sell the Throttle Body unit for. The Vortec 6. I have a 99 1. This will work without pinging, but if you tried to run an engine with a compression ratio of 14 to begin with, it would almost surely ping. I told dealer, they suggested cleaning fuel injectors, charged me and didnt fix it. BMW sensor faults and problems. And stayed off. A few thoughts come to mind: 1. An engine that hesitates, stumbles or misfires when accelerating or when it is under load, is an engine that is either sucking too much air, not getting enough fuel, or misfiring. 025 and the dwell at idle speed was 37-42 degrees. Had a new one installed and that fixed that. There's no doubt that using a higher octane fuel gives a better result. We normally set it for 30% low and 80% high. Return the engine speed to idle and verify if the knock returns. Took it in to the dealer: "this is a known issue with the Forte. Sounds like you could be getting detonation (engine pinging). 7 has a pinging problem. The higher the octane the less likely the fuel will pre-detonate. Discussion Starter • #1 • Jun 2, 2014. On mild acceleration at low RPM/boost, mine does the same thing. 4l has a pretty decent ping when i start traveling up decent size hill, but still in Overdrive at a low'sh rpm. 2 gallons left to refill it with premium. Here's a hint, if Proton wants a quick solution, recalibrate the ECU at low rpm high load condition. It broadens the power band by about 1000 RPM, making the engine rev easily to 6500 RPM. The fuel pressure regulator may be operating at low pressure. If I put the pedal to the floor or accelerate quickly and pull the RPM back and cruise, it. Another source of pinging is a carbon buildup inside your cylinder heads. So, we retard the IVC a tooth, bring the compression back under the limit, and push the tq peak to a higher rpm, and make more power by extending its breathing capacity up to 5500+rpm, instead of 4800 rpm. Retarding the cam timing can also lower cylinder pressures to reduce detonation at low r. The problem is that there are many situations where airflow is the same even though the loads and rpms can be very different. I changed to a cooler plug (NGK Iridium) but it didn't change much. ELI5: That sound when driving in a high gear at low RPMs. If you look at the service bulletins you will see excessive ticking between 2000-2500 RPM for '05-'06 models. LS 430 2001 has 145k miles daily driver and has started to ping (detonation) in the last 2-3 months. This also creates the common "pinging" noise that is often described when knock is present. Advancing it made it go away. Remember this; a correctly timed engine produces the most horsepower. If your engine does have an OEM retarded camshaft timing set, you may gain some power at low rpm by switching to a non-retarded camshaft timing set, but the improvement is unlikely to be dramatic. When you have a bad MAP sensor, the engine sometimes runs lean, which will cause the combustion to fail. Keeping the transmission in a high gear at low engine RPM is called lugging - and, yeah, it's not good. The metal gargling is usually heard when under a load. The GEAR (too high) and RPM (too low) when in it especially when Hot out. The most common diesel engine problems that require repair include: Diesel Won’t Start Hard To Start Diesel Engine Diesel Runs Rough At Lower RPMs Lack of Diesel Engine Power Diesel Engine Knocking or Pinging Black Smoke White Smoke Blue Smoke 1. with about 136,000 miles on it. Theres actually a Porsche engine problem that is far worse in the US due to us lugging their motors. Jump to Latest Follow 1 - 7 of 7 Posts. 5PSI (300 KPa) = 60lb/hr / 12. I took it a second time to the dealer after the carbon clean difficult even for me to hear the ping and this was just before a rainstorm if that helps. The fact that it goes away at higher RPM could be due to higher oil pressure, and depending on what is the. It is jumping around in a random way from one cylinder to another. I bought it new in 2-2009. Learn what to check for if your vehicle's engine makes a knocking or tapping sound that varies with RPM, or at times is almost inaudible. Check the throttle cable adjustment screw. Advancing the ignition timing TOO MUCH at any speed will result in less power, and may result in damage to the engine. For example 2000rpm at a high load and 3000rpm at low load can have the same airflow. For this engine, 16. But once the RPMs come up a bit and boost builds, the rattle goes away. As a general rule, light throttle between 1,500 rpm and 1,900 rpm can be okay – as in maintaining an even speed on a flat road. I noticed today that right when I got into the car with a cold engine - no ping till it warmed up. the knock is pretty deep sounding and sounds as if it is coming from the driver side, in the very back of the engine. If you’ve got rod knock the sound will change with engine RPM and will not change with engine temperature or load. And stayed off. Poor idle and running at low-rpm's, but fine at high rpm's; 5. In most high compression engines, greater than 10:1, pre-detonation occurs due to low octane fuel. Also I tried different gas shell, Exxon and BP. The shift interupt switch kills the engine for a second to help take away load when shifting into neutral. Check the spark plugs, if it is a little white on the ground electrode, it runs lean caused by vacuum leak. With this setup, you will know exactly at what RPM and vacuum reading your pinging will occure, then you can duplicate the result in the shop. At low rpm, the ping sounds more like a solid knock. Took it in to Smythe and they will keep it overnight to check it out. That sounds more like pinging when you accelorate. Worried it's engine pinging/preignition. The last production year for the 396 was 1969. When the engine is cranking, the timing will be retarded. At 3000 rpm, it's already producing about 50% more power than at 2500, and at 4000 rpm, the engine is producing almost twice the power it produces at 2500 rpm. Removed the efi stuff and Put in a carb. 4000+RPM at WOT at speed, pulling up a hill or passing on the highway. On race cars, the engine spends very little time at low rpm, so many times the vacuum-advance system is eliminated. Replaced plugs w/ Autolites while I changed wires. Then, Most likely you’re probably experiencing spark knock. Improves Low-rpm Performance Engine knock is. No diff in the power, ju. The chances are that you are suffering from a condition known as "engine knock". No PCM codes, no cooling issues. Take a few minutes to make sure your engine is idling smoothly at a comfortably low rpm. At low rpm, the ping sounds more like a solid knock. You can google Atkinson cycle to see what is done. For instance, I recall my 4. This article discusses how knocking happens, describes three types of knocking, and gives you ten detailed discussions of system problems that cause. I wouldn't worry about it, it won't do any damage". How to avoid engine knock. Could be detonation from low octane fuel. No rebuild. Torque, a measure of the engine’s instantaneous twisting. 4l has a pretty decent ping when i start traveling up decent size hill, but still in Overdrive at a low'sh rpm. I am new to this forum but have had my 06 Cummins 3500 Auto Short Bed for about 7 months now. Knocking (also knock, detonation, spark knock, pinging or pinking) in spark ignition internal combustion engines occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignited by the spark plug, but one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front. The vacuum gauge reading is steady, but constantly low. So after I press the gas to compensate for speed loss, but before the downshift occurs. As you can see with the larger Supra MAF the settings must be much higher to compensate for the greater air flow through the larger MAF. Then you would have the pipes rapping, plus wind and road and gear noise, etc. SYMPTOM SUMMARY The engine "pings" or knocks on acceleration. The ping goes away when the engine warms up. I started using 89 gas on hot days and the pinging seemed to go away. When the engine ist cold, you cannot really hear that sound. It would happen when I was accelerating or pulling a grade, I could not make it happen by. Many things cause pre-ignition and correction always depends on finding and correcting the cause(s). 050 inches with 0. Initial AFC Tuning (Low) While in neutral, try revving the engine to the exact RPM settings on the AFC. Engine size does not affect HP as much as torque. Engine knock occurs more easily at medium to higher rpm when you load the engine. Run the motor rich to start for the first 2 tanks on the bench or on the ground. The engine may actually be lugging but I can't help that b/c the truck shifts up to a higher gear a. Heavy carbon buildup will be indicated by higher than normal engine compression pressure readings. Seems to be getting worse. The fuel-air charge is meant to be. Engine pulls to redline no problem. This effect is exaggerated when cold and causes the cam chain to slacken then tighten causing a slapping sound. So that's why I've stuck with Esso lately. I will come to a stop and my truck with start spiking and dropping RPM's. Abnormal combustion, more commonly known as knock or detonation, has been the limiting factor in internal combustion engine power generation since the discovery of the otto cycle itself. Try to advance it a little and drive it. It used to ping badly and I upgraded to top grade gas and the ping went away and the mileage increased 9%. does the car have a timing adjuster or chip and does it do it in all the gears or just one ? mines does it in 5th under 1500 rpm if it`s real bad don`t drive the car it sounds like detonation and can destroy the engine. I got a C230 rental and its 2. A rich pilot setting will result in hard starting, plug fouling at low RPM’s, sputtering as the throttle is cracked opened. This is when you are in 5 th gear or overdrive with the converter clutch locked and the engine RPM is around 2000 RPM and you advance the throttle into boost and you get the engine knocking and pinging. So after I press. The frequency is much higher than walking along a fence. And if you always drive your truck "like it is supposed to be driven" then you will definitely get above 3500 rpm, and hopefully get it up to 5500 now and then!. But it is almost impossible to make a modern car do it, driving normally. , it pings if I try and get on it at lower rpm's. Discussion in 'Early CJ5 and CJ6 Tech' started by erhuff, Jul 10, 2017. I was putting regular 87 octane gas, then i tried to switching to 93 octane premium. Then you would have the pipes rapping, plus wind and road and gear noise, etc. Everytime when I slightly press on the gas pedal, it produces audible pinging sound from the engine. It is adjustable from 5,000 - 10,000 rpm by a rotary dial under the cap and rotor (Figure 1). I just take it easy on those days, and try not to lug the engine. This one surprised me as the engine really likes synthetic oil - it quieted down big time and added a couple hundred more rpm at the low end! 2. 3 Vortec engines made from 1996-2002 (L35 and LF6) have been reported to have engine knock problems. So I tend to say: "No wonder" the engine doesn't like it. This car is a Toyota Corolla 1500cc, multipoint injection. Announcements. If it only occurs at certain RPM ranges, it's likely not any engine internals, but something loose somewhere that vibrates when the engine hits the loose object's natural frequency. A 91 octane from a Sunoco, an Exxon, or a Global is still a 91 octane. Feels like a thump at low rpm, and will buck a little at 1k-2k rpm cruising. Many street engines are deliberately built with a late-closing intake valve to bleed off cylinder pressure at low rpm to stave off detonation. LS 430 2001 has 145k miles daily driver and has started to ping (detonation) in the last 2-3 months. That said there are other causes of pre-detonation, such as carbon buildup on the valves or pistons creating hot spots in the cylinder. 5:1 compression. The 550 ci engine will out torque the 350 at low to mid RPM. Cruising around at 20-25, the truck is usually at 1000-1500 RPM when the road starts uphill. You should hear a loud ping when either running at very low RPM under load try running in 5th gear at a low RPM and giving it some gas. Hesitation, low power, misfiring, pinging and a number of other conditions are symptoms of incorrect dwell. It doesn't do it at higher RPM like highway speed. The last production year for the 396 was 1969. It is much more noticable under light and moderate. Happens at low/medium and high rpm; every time the engine is under any kind of load. One issue with the vacuum unit is that it kicks in more advance at fairly low speed and light throttle. On flat ground, I can let the clutch out at idle and not kill it. I also currently have a code 22 that indicates the TPS is out of adjustment that is making it idle poorly. On mild acceleration at low RPM/boost, mine does the same thing. Another solution is to revise the gear ratio to avoid engine operating operating longer at low rpm high load for Malaysian driving style. IE Richer mixture. Due to the great performance potential of these engines, parts are easily available from most any performance auto parts supplier and usually at reasonable prices. An improper spark plug gap could lead to engine knocking and poor performance. KIA - The Power To Surprise. Knocking is not just upsetting: it's dangerous. 7L Engine — If Equipped This engine is designed to meet all emissions regulations and provide satisfactory fuel economy and performance when using high-quality unleaded gasoline having. Problem is a ping below 1500 rpm, engine hot,light load going mostly up hill or light acceleration. When you have a bad MAP sensor, the engine sometimes runs lean, which will cause the combustion to fail. Aim timing light into timing inspection hole. But it is almost impossible to make a modern car do it, driving normally. Due to the great performance potential of these engines, parts are easily available from most any performance auto parts supplier and usually at reasonable prices. Enter the engine displacement size for the designation. You can google Atkinson cycle to see what is done. Followers 2. Are you having problems at high engine RPM (4000-7000) and wide open throttle (WOT)? If so it could be spark plugs. Heard it again this morning on the way to work, pulling onto the freeway at WOT. He mentioned something like, not more than 1/2 throttle til pass 2x Idle?. 94 4x4 22re 5sp. It will also do this at times when I stop at a light or stop sign. When climbing any kind of grade (usually offroad) at low rpm truck starts to ping and miss and spew out more white smoke than any person could imagine. I use name-brand premium gas every time. Replaced oxygen sensor and code is gone and the intensity of the hesitation is halved, still there though. Re: C14 Engine pinging due to low octane fuel FIRST HAND EXPERIENCE « Reply #23 on: January 30, 2014, 11:10:16 am » Daytona Mike - the c-14 at 10. Engine pulls to redline no problem. I started using 89 gas on hot days and the pinging seemed to go away. I had a Slight hesitation at low rpm and found out my timing was at 12 degrees. 025 and the dwell at idle speed was 37-42 degrees. 1966 Mustang and Shelby Distributor Information. This car is a Toyota Corolla 1500cc, multipoint injection. So after I press. what im thinking and this is just me but i never had a engine overheat then cause a ping. I had the Mass Air Flow sensor cleaned; maybe they - Answered by a verified Nissan Mechanic. Plus it pinged under 6,000 rpm, that really nasty pinging that makes your skin crawl. cleaned injectors, throttle body and same problem. Now temp doesnt seem to matter Hyundai is stumped and sent a flight recorder to record exactly what is happening. My 2008 CBR1000RR every time I take off from a stoplight normally, I get either a valve chatter noise that sounds like light engine pinging or knocking but not very sure. 4 with new 1409 Edelbrock carburetor and a rv. Pinging is a higher pitched metallic sound, a 911 engine pings mostly at higher rpm, around the torque peak, at WOT, especially when the air and oil temperatures are high. What should the rpm be when at highway speed to keep from lugging engine? 2500 - 3000 Any information will be greatly appreciated. I noticed that my 426 makes a chirping sound here recently at low engine speed, just over idle, then goes away at higher rpms, and comes back at the same rpm when shifing thru the gears. 8" at idle. The vacuum distributors can run up to a maximum of about 40-42 degrees under the right conditions (light throttle and medium speeds for example) and this helps fuel economy. The higher the octane the less likely the fuel will pre-detonate. Toyota’s 1FZ Engine. Again find a hill during the hot part of the day and cruise at a low rpm in a high gear and roll on the throttle a bit. It would often take 4,000+ RPM to see all of the timing “in”. When you run diesel purge through your engine most of these noises will disappear within ten to fifteen minutes. On the way home pinging started at 2800 RPM. The net effect of an ignition timing curve is to achieve Peak Cylinder Pressure (PCP) somewhere close to 10 degrees after the piston goes over the. After sitting for a period of weeks, I cranked it one day. So if you cruise at a lean mixture and them decide to climb without adjusting the mixture, you might get detonation. Load: This is the theoretical spark that produces maximum torque for the engine, it is used for torque calculations and is also a maximum limit for spark advance. Initial+centrifugal timing is 25 degrees at 2000. When I switched back to 87 it started pinging again. My 65 GTO w/ 10. Most pinging noises at idle or low RPMs are not usually in the motor itself but rather from rotating parts that periodically touch something, and often happen when something comes loose or is bent, bearings get worn, or something made it into the engine compartment that shouldn't be there (a tool, a rock, etc. If you can imagine the piston going up, squeezing the fuel. Knocking is not just upsetting: it's dangerous. First thing that really surprised me was that the timing advance dropped from 700 RPM to 1000 RPM. Everytime when I slightly press on the gas pedal, it produces audible pinging sound from the engine. have it checked epsecilay if you can feel it in the engine compartment. 4l has a pretty decent ping when i start traveling up decent size hill, but still in Overdrive at a low'sh rpm. This may be caused by using gasoline with an insufficient octane rating, carbon buildup within the cylinder itself or improperly functioning spark plugs. engine pinging jackhammer noise sounds exactly like a jack hammer. Always at low speed (i. At this time (early in 2002), Harley offers a number of alternate Screamin' Eagle ignitions for the TC88 engine. The technician performs a manifold vacuum test. Also I tried different gas shell, Exxon and BP. In most cases this will be anywhere from 600-850 rpm. The engine did heat up about 3/4 on the temp gauge due to the radiator being pretty low but it did not overheat. Learn what to check for if your vehicle's engine makes a knocking or tapping sound that varies with RPM, or at times is almost inaudible. your rpm range doesnt indicate ping--typical ping is more pronounced on low end lug. Anyone hear an slight irregular pinging/knocking sound at low RPM's, going up inclines from their 6. It is jumping around in a random way from one cylinder to another. I bet at least one of two things is happening: your cam (which you didn't mention either) bleeds off a ton of pressure and/or you don't actually have 12. L35 and LF6 Engine Knock Problems. Pinging is that high pitch ringing sound that an engine sometimes makes when the throttle is opened with the engine under load. A heavier big spring will delay total until after 4000 rpm and a lighter big spring will allow total to come in before 4000 rpm. Once engine hits 2200 RPM no pinging under the heaviest engine load. Temps have been really low lately, and it's still happening. Any advice where I should begin looking would be appreciated, Im going to do a compression check on it and check the base timing although there should be no reason for it to have changed. When you have a bad MAP sensor, the engine sometimes runs lean, which will cause the combustion to fail. An engine designed when 102-octane high test was at almost every fuel station in the country being forced to run on today's gas means that ping has become an all too common companion, and what if. First set it the base timing to stock specification, and plug the vacuum advance line while driving the car. This is called "lugging" and you can tell when you're doing it because it'll either knock or ping or, when you step on/twist the throttle, it won't accelerate or it will buck. Bike still under warranty and dealer is suggesting carbon build up in head, wants to tear down engine.