Engine Misfire When Accelerating

While the problem is usually first noticed when at a stop, it may also make it seem like the car is vibrating when driving. Mine is 2003 6MT 3S-GE. No engine light, but it seemed like the engine was bucking with the lightest acceleration varying severity the more I pushed the pedal down. First insert the timing check plug (located by the distributor) that bypasses the computer advance curve, then turn the motor up to about 3500-4000 rpm. When a misfire occurs, you can feel it like a light or massive jerk coming from the engine. STFT and LTFT are spot on, vacuum looks to hold in gauge mode, all exhaust fitting are tighten to spec. Sounds like it is missing but since I've never heard misfire I cannot tell if that's what it is. The problem continues, last night i swapped out the coil pack again, and had the cel codes re checked at autozone i had three codes; 1171 (lean mixture during acceleration), 0157 (O2 sensor bank 2 sensor 2) and 0304 (misfire #4 cyclinder) I'm beginning to think i may have a problem with my fuel injector on cyclinder 4. i feel dumb but now it runs alright at idle. com/services/ignition-coil-replacement ). Most of the time it's going to be the spark plugs or coil packs that are the culprit. and recently started having issues during acceleration on highways. GM’s trouble tree for code P01345 pretty much states that at 1000 rpm you should have between -5 degrees and -15 degrees and if you rev the engine to 2000 rpm there should be no more than a 2 degree change. You can see that #3 is right after #4. We talk about Engine Misfires for VW 2. Runs fine during sunny days. I think that might have been my problem all this time!. Damn misfire and shudder when accelerating Hi again folks , just wondered if anyone can help me with the continuous problem , Car hunts on tickover and when starting to accelerate mainly 3rd gear and above I get an awful lot shuddering and shaking I can accelerate through it eventually but under load at lower revs it's most violent. Engine electrical, distributor parts recently replaced. If there is an imbalance with this ratio, the car engine skips one of the processes of its combustions cycle and ends up misfiring. Need some advise. An engine misfire can be caused by a few things. Your car's engine needs both fuel and air to do its work. Anyone on this fount of info with any ideas? Thanks in advance. I have a passat tdi Pd engine and i having a problem with engine shake, vibration only when idling. Had it diagnosed and came back as cylinder misfire. I had a consistent misfire which when the engine was really hot would result in engine cutting out and me coming home in breakdown truck. Misfires will flash the check engine light while they are happening and the feeling can be described as a power loss, cutting out or even a rev limiter type feeling. It has a slight misfire under acceleration (more noticeable under heavy acceleration). In this article, I present some of the possible causes of whining noise while accelerating. Anyone elses car misfiring with colder weather and having One Step Colder spark plugs? I've started to notice my car started to misfire under hard. The sputtering is upon acceleration of any kindonce at highway speeds it's seems "OK". If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary,. The misfire is clearly felt at this speed because the torque converter clutch is engaged that means the engine and transmission are considered as 1 unit so any slight misfire in the engine will be felt in the transmission and this is happening only when cruising. The problem still persists. Like it is not getting fuel or a spark, off and on real quickly until high RPM reached. Yesterday I let the engine run and got down on the ground. 2L V6 Post by 2002 RedF150 » Fri Dec 16, 2011 3:00 pm I have read several similar forums on this topic, but I am not sure it is truly the same situation. An engine misfires under acceleration due to faults in the spark plugs, plug wires or coils, or a weak fuel pump. Had a similar problem in my 2001 s60. Replaced plugs, replaced coil pack 3000 miles ago. Unplug mass air flow sensor restart truck and drive to see if helped. It's worse when I get up into 3rd and 4th gear and give it more gas. The backfiring and hesitation eases somewhat when the engine's warmed up, but it will do it every time, warm or cold, between 1900 RPM and 2800 RPM at half to full throttle in second, third, and fourth gears. Average repair cost is $420 at 86,250 miles. Hi all, I have a V8 S4 2003. Anyone on this fount of info with any ideas? Thanks in advance. misfire during acceleration (Very Flat) Fuel pressure at idle and hgh rpm is within spec and the pressure regulator is not working overtime. The misfire can be caused by a number of different things. The check engine light has never come on during all of this. " This would be mixture leaning out, or the spark becoming intermittent. Spark Plugs are one of the most common reasons a vehicle will jerk when accelerating. Sometimes we experience an annoying hesitation or stalling when we are cruising in our cars and decide to accelerate either slightly or harder. The basic symptom of a misfire is a light to severe rough idle that's felt when the engine is idling and a light to severe engine miss (hesitation) when the engine is under load (for example: your Ford vehicle moving from a stop). I drove today with the overdrive off but felt it again accelerating from about 35-40 mph. These misfires do often come under load from the engine, and you have the most load on the engine when you are accelerating on higher RPMs and higher gears. Engine hesitation, almost by definition, usually goes back to a misfire in one or more of the cylinders. The worst misfire is Intermittent misfires, this misfire is not easy to diagnose because comes and goes of this misfire depends on the engine operating conditions or the engine load. Home » ShopTalk » Auto Repair Topics » Engine Performance: Misfires. A P0300 diagnostic code indicates a random or multiple misfire. Crap like this drives me absolutely nuts. The engine does not always completely stall. Since you replaced them, that of course was not it. My 1986 Silverado C10 with a small block 305 is having a weird misfire issue. This is what I am experiencing. The truck would start to shudder and shake and even if I let up on the throttle and then tried to accelerate, it would happen again. Also, the problem is a little worse when the motor is warmed up once it is up to temperature, it bucks sometimes when starting to accelerate slightly. The car is sputtering on acceleration when the pedal is first pushed and then hesitant as it builds up speed. The engine suddenly looses power and accelerates again during mid rpm. First I read the AFR going too lean during acceleration. 8 its been fine for months but has developed a misfire when you start accelerating at low revs - anywhere between 1000 - 4000rpm. I have a SEAT Alhambra (yes, I live in Europe) which has a VW 1. When running down the road at a steady speed and fairly low RPM, say around 2500, every once in a while the bike will have a very sudden and slight misfire. You'll look for the valve spring that barely moves on that #2 cylinder. I cruise along at between 45 and 55 mph with the transmission in OD and torque converter locked up, rpms between 1400 and 1600. Fuel related misfires can be caused by many different things such as low fuel pressure, faulty or dirty fuel injectors, a faulty O2 sensor, a dirty or failing mass air flow sensor, a faulty or dirty idle air control valve or a vacuum or intake leak. After a short ride, we stopped for her to get gas. W215 CL500 MISFIRE when accelerating hard at 4000rpm Discussion in ' Engine, Drivetrain, Fuel and Exhaust ' started by gt-5idhu , Jul 8, 2015. Plugs are new, wires are new, dizzy and coil is new. Rough Acceleration. Although this case study involves a 2000 Chevy Monte Carlo (with a 3. Then I step very slightly on the gas to accelerate and I feel a slight bobble in either the engine or transmission. 5 turbo and having a fuel problem i think. We reported on a fix for the 2011 and 2012 Ford F-150 with misfire/running rough/intermittent stumble under hard acceleration during wet/humid/damp conditions. bmw 850ci multiple misfire m73 engine 1997 BMW 8-Series Forum. It’s a good idea to check whether this is the case first, but if it is, fuel injector cleaners can easily be added to your tank. 2001 Ford F150 6 cyl 4. Another possibility of a misfire may result when the motor has low fuel pressure , dirty injectors or potentially a faulty ignition coil( https://www. When restarting the car, the engine seemed to idle rougher than usual. But my main concern is that today I felt a misfire or skipping when i barely push the gas pedal at about 40-45 mph in overdrive. The truck has 190K miles on it and runs fine other than a misfire. This is a real life case study that will help you diagnose a hard to find misfire. How to Fix a Misfire Easy step by step guide on how to troubleshoot and repair an automotive engine cylinder misfire P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and P0308, though appearances may vary, the process is similar for most vehicles. it does not show "check engine" lite or set a code. Carbon build up in heads/cylinders. Compression is good. No problem in town or clicking/popping when turning. 8 v6 Camaro engine hesitation/misfire when accelerating? vehicle info: 1996 3. It is saying misfire on 1 or 2 cylinders and something about system to lean. Re: engine misfire I know this is an old link but I have the same problem. There could be many different causes for your car to hesitate when accelerating, but sometimes this hesitation is caused by something that we can take care of by our selves - a dirty MAF sensor. A P0300 diagnostic code indicates a random or multiple misfire. In the last couple of day the RR really struggles when pulling away from cold - she hesitates, lacks any acceleration and produces a series of 'popping/misfire' noises from the engine. I had a consistent misfire which when the engine was really hot would result in engine cutting out and me coming home in breakdown truck. The check engine light flashes when the car is shaking as well. It runs fine all other times, in the morning, when cruising etc. This loads the engine so weak firing cylinders will show up and can actually be felt as a slight surge or hesitation. Any ideas would be greatly appreciated. Engine stuttering when accelerating. 1996 Ford F 150 Eddie Bauer. When a misfire occurs, you can feel it like a light or massive jerk coming from the engine. It does it sometimes at idle when cold and does it just going down the road at 40-45mph when it gets into overdrive and is running in the 1500RPM range. Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly. I had a consistent misfire which when the engine was really hot would result in engine cutting out and me coming home in breakdown truck. The "sharp" misfire, on the other hand, frequently relates to ignition problems. Engine misfires can be distressing, but they are easier and cheaper to take care of than you think. It feels like a misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. Accelerating might be hesitant, and engine shaking during engine idle might happen. >"but upon acceleration at high rpm it misfires. Might be oil in the spark plug wells, or bad coils. Misfire dissappears on heavy acceleration. The most common symptoms of this issue is cylinder misfires under load accelerating or most notably cruising around 55mph in overdrive. When a misfire occurs, engine speed will fluctuate. You can see that #3 is right after #4. Also when going up a hill, accelerating and shifting from reverse to drive. The "sharp" misfire, on the other hand, frequently relates to ignition problems. If the operating contribution is erratic on one bank, replace the check valve on that bank. Hesitation/misfire under acceleration. Something is causing cylinders to misfire at random, which is a lot less cut and dry than a cylinder specific misfire code. Your car's engine needs both fuel and air to do its work. I have no loss of boost power, Cant find any pipe leaks, cars not over smoking and no knocking ticking or any cam wear noise. When the issues start, the engine misfires, has lean/rich issues, jerky acceleration, etc. A good fuel pump is usually capable of pumping at least 750 ml (3/4 quart) of fuel in 30 seconds. We're not talking about a knocking engine or one that idles rough or stalls. mostly between 3-4k rpm when im easy on the gas and 4k+ rpm if i floor it. The Top 5 Causes of a Car Misfire. As for the vacuum thing, the engine lights been on for a couple weeks (on and off), checked it a few times, and it was misfires. Causes of a Jerking Car Engine on Acceleration. 120,000 miles. Titan P0300 OBDII Code Symptoms. I have the same engine in a '99 caravan and found the for some reason the spark plugs on cylinder 3 and 4 loosen up after one year and cause a misfire between 45 and 50 mph under load (when mildly accelerating). When it is solidly lit, the issue can range in severity from something minor to something rather concerning. Settlement Pool: Not applicable: Settlement Website: Honda Misfire Class Action Settlement: Claim Form Deadline: April 10, 2014: Claims Administrator:. when accelerating. I ran some fuel injection cleaner with my tank of gas (about 1/2 full still) and alas, no headway (even worse actually). Went to a local mountain hill that always gave me a problem when accelerating up it. I have a 2006 Pontiac G6 and lately seem to be having issues accelerating. Only misfires when the engine is cold; Only misfire when the engine warms up to get too much hot. Rough Idle. It can happen when moving up the gears or when in 6th and you accelerate (for example, on the motorway) There appears to be a misfire and a load of smoke blows from the exhaust. other times it will give me a normal ride. It happened twice last week during my ride home from work. Your car's engine needs both fuel and air to do its work. completely unpredictable. and during after it starts to hesitate on acceleration if i slow to a stop and let the car idle while in Drive, the engine has a rough loping idle. You can use Seafoam or top end cleaner as well as other type of carbon remover. No vibrations were felt when we raised the engine rpm while the vehicle was in Park and under no load. The sensible method is to gather available knowledge about the engine misfire, focus on steps necessary to eliminate suspects and let the process guide you to. Mercruiser 4. Rough acceleration is a typical sign of that your engine is misfiring. on acceleration in 1st or second gear (don't usually get 3rd gear to 3000 rpm) when i get to around 3000 rpm the engine stumbles real bad. Engine Misfires When Accelerating, When I press down on the gas pedal the engine develops some kind of misfire, causing it to shake violently and lose power. We're talking about engines that start easily and accelerate smoothly, but then, after a few minutes at a steady speed, either surge in speed or misfire, causing the car to "buck. It happens during acceleration from cruising around 1500 RPM. Feels just like a misfire/timing problem, and gets worse under heavy loads. or any other way. When it first showed up, I thought it may be bad gas. 4L V6), you can apply this info to any 3. Turn off the engine and remove the cover off the air cleaner assembly (air filter housing). To check the air filter, hold it up to a strong light and if you can see light through the filtration media, it's fine. The only data pid that was a little off was the cam retard. changed the #2 wire and no more misfire on #2 however still frequently get acceleration misfires and studdering. Any ideas would be greatly appreciated. Also, I think I can smell gas in the oil. The car would misfire under acelelration. Since the OP's car is a Regal GS (Supercharged) the UIM problem (which is common to the Base L36 Plastic UIM) is not the issue here. do you have the 5. SYMPTOM SUMMARY The engine "pings" or knocks on acceleration. Except that this morning I was able to pull out of a camp and accelerate slowly at about 30% boost without a misfire By the way I have CAT filters What has the atmospheric sensor got to do with it? I ask because my "check engine" warning light would come on occasionally when going up a hill. Thank you in advance for. This is a general engine misfire. That’s why a systematic approach to misfire diagnosis is essential. While ignition components are very common to go bad causing the engine to misfire, there is still fuel delivery (low fuel pressure or faulty fuel injectors) or even base engine mechanical issues that can cause the engine to misfire. The backfiring and hesitation eases somewhat when the engine's warmed up, but it will do it every time, warm or cold, between 1900 RPM and 2800 RPM at half to full throttle in second, third, and fourth gears. This problem leads to all kinds of engine performance issues: The engine jerks and loses power, and fuel consumption and emissions go up. '04 XC70 misfire, sluggish acceleration; no codes If this is your first visit, be sure to check out the FAQ by clicking the link above. I was so frustrated I told the service manager to have my mechanic drive it home for however long it takes to figure it out. Sometime for no apparent reason this misfire seem to occurs. Engine Hesitation Problem: Car Hesitates When Accelerating ARP September 16, 2017 Engine Related Issues Leave a comment Hesitation is when the engine stumbles, misfire or when you step on the throttle or you accelerate it lacks of power. A failing or dirty fuel injector can cause a regular misfire (and a trouble code), which can eventually escalate to stumbling and hesitation. By the time I backed out of the driveway the check engine light came on. She pulled over and noticed the check engine light on. A 2003 Ford F-150 V8 rolls into your shop, with the customer complaint that the vehicle runs rough at times. It doesn't seem to do it until the bike is warmed up. The problem often means the air/fuel mixture is not being properly enriched or is going lean, or the ignition system is weak and is misfiring when the engine comes under load or the air/fuel mixture goes lean. When your engine hesitates during acceleration, it may seem to have lost its power for a few seconds. In addition, if you have a sticking (gummed-up) EGR, it may eventually require replacement. When running down the road at a steady speed and fairly low RPM, say around 2500, every once in a while the bike will have a very sudden and slight misfire. The car will start and run fine, but will stop running anywhere from seconds to minutes later. the engine sputter slightly when I let go of the gas sputtering stopped. for 4 and 6 at the same time as the labor was the same. [In India, ₹3000] So following are the most common symptoms of an misfire engine with its causes and also with the reason why this misfire happens in your vehicle. Engine stuttering when accelerating. 3 v6 for over a month now. It happens during acceleration from cruising around 1500 RPM. Titan P0300 OBDII Code Symptoms. Driving a vehicle with a misfired engine is the stupidest idea as it could bring the vehicle to a halt in the middle of nowhere. An engine misfires under acceleration due to faults in the spark plugs, plug wires or coils, or a weak fuel pump. A car sputters when accelerating due to the fact air and fuel is not being properly mixed, therefore, forcing the car to run on unburned fuel. my truck is having the issues outlined in the nhtsa investgation pe13018. As it warms up, it misfires a lot while accelerating, I'm guessing around 1500-2000 RPM, but there's no misfire at much higher engine speeds, or at idle, or when it's cold. Hi everyone, I'm Julian I live in France (Strasbourg) and I'm living a nightmare with the famous misfire issue on the A2s. The 2012 Ford F-150 has 12 problems reported for engine missfires under hard acceleration. yourmechanic. Vauxhall Astra | Misfire under load This next problem comes from a 2001 Vauxhall Astra 1. While the problem is usually first noticed when at a stop, it may also make it seem like the car is vibrating when driving. Broken rods, pistons or crank bearings, cooling difficulties, and failed or distorted valves may also cause the engine to misfire. Moved the car to the street and the engine seemed like it was going to die. By the time I backed out of the driveway the check engine light came on. " This would be mixture leaning out, or the spark becoming intermittent. No engine light, but it seemed like the engine was bucking with the lightest acceleration varying severity the more I pushed the pedal down. The problem often means the air/fuel mixture is not being properly enriched or is going lean, or the ignition system is weak and is misfiring when the engine comes under load or the air/fuel mixture goes lean. Re: engine misfire I know this is an old link but I have the same problem. The "soft" misfire, often called a surge, is commonly associated with fuel related issues. High RPM misfire. Swapping out the ignition coil for another one made no difference, as did swapping the distributor cap back. The check engine light ("malfuntion indicator light") is on and the EPC Electronic Power Control light also. 2 Engine hesitating under load. Engine misfires randomly. As mentioned in the youtube description, I move from 2k-2. when accelerating. Why is the engine bogging under acceleration? I recently managed to get the moped running properly, albeit for only a short time. If that is happening in an LPG converted car with (say) an ignition fault only present when running on LPG (see point 5 above) then things can become really difficult to fathom. I would assume you have a code P0300 or P0302. Chevy silverado 5. Warm the engine to operating temperature. I have a 2006 Pontiac G6 and lately seem to be having issues accelerating. If the Engine System has a Misfire Counter for specific cylinders on the Scan Tool Data Stream, pay very close attention to the cylinders(s) named in the misfire code(s). As mentioned in the youtube description, I move from 2k-2. The problem often means the air/fuel mixture is not being properly enriched or is going lean, or the ignition system is weak and is misfiring when the engine comes under load or the air/fuel mixture goes lean. Shots in the Dark: ENGINE MISFIRE DIAGNOSIS BY JOHN THOMPSON Chasing after something you can't touch, that can come and go seemingly at will, can be confusing and frustrating. Hello All, I bought my 2010 Prius IV Solar/Nav pkg in Febrary 2011. Freelander td4 2002. It starts to misfire violently and feels very hesitant. Need some advise. If I put it in neutral and rev the engine, it revs just fine. 0L spark ignition engine (engine code: N43B20A) was reported to have been suffering from occasional rough running when starting and the engine management light was illuminating. It tends to do this for about 15 minutes after the vehicle is started (completely to even slightly cold, it stops once it warms up enough) roughly 5-10 start/stops in that 15 minutes. The engine may misfire and/or buck while driving at freeway speeds with no fault code stored in the powertrain control module (PCM). I think that might have been my problem all this time!. When running down the road at a steady speed and fairly low RPM, say around 2500, every once in a while the bike will have a very sudden and slight misfire. Driving a vehicle with a misfired engine is the stupidest idea as it could bring the vehicle to a halt in the middle of nowhere. Normal engine maintenance schedule followed. Low speed high gear the car jerks a bit but after 3,000 rpm no worries all is fine Even in 2nd after a roundabout when I accelerate it car jerks then once the revs rise it is ok. Replied by spelunkerd on topic Engine flutter while accelerating Can you be more specific about the 'flutter'. While the problem is usually first noticed when at a stop, it may also make it seem like the car is vibrating when driving. No, plugging a computer in won't tell you what's wrong. The context of the misfire is a great place to get an idea of the driving conditions the vehicle was under when it detected the misfire. I had a bunch of these symptoms on my '99 LC (mostly stock, only 120k miles) - rough idle, loss of power, and a flashing check engine light under certain conditions (seemed to be slightly higher torque/RPM, like trying to accelerate on the highway). Re: 2001 Toyota Celica GTS Engine Blips/Stalls/Misfire Quote I'm hoping the symptoms I mentioned will help others diagnose a bad fuel pump in their vehicles, without the need for a pressure check. and during after it starts to hesitate on acceleration if i slow to a stop and let the car idle while in Drive, the engine has a rough loping idle. Fine (or close to fine) when at constant throttle. Is the engine symptom low power, poor acceleration, or poor response? NO 2B STEP 2B: Engine misfire, engine speed surge, or engine speed unstable. I need any help and advice that I can get. When cold the engine misfire occur, however after the engine warms up then it goes smooth out. When your engine hesitates during acceleration, it may seem to have lost its power for a few seconds. Looked down at the laptop and saw cylinder #5 go from no misfires to several hundred. V6 Tech discount auto and it still reads cylinder 1 misfire, bad timing under 1000 rpm, but now cylinder 3 is misfiring also. 4L V6), you can apply this info to any 3. Model and MY, Please!!! The DME can identify which cylinders are misfiring. Swapping out the ignition coil for another one made no difference, as did swapping the distributor cap back. A misfire is when one or more of your engine's cylinders are not providing power to the vehicle, with raw fuel possibly running into the catalytic converter. 2006 Road King fuel injected, no modifications. The car is sputtering on acceleration when the pedal is first pushed and then hesitant as it builds up speed. I raised the Acceleration Enrichment to about 55. This can be caused by an intermittent fault with the camshaft synchronizer assembly. 7 only 55K miles - What is causing an intermittent misfire at startup? It's been running great, then 2 weeks ago when I started it up I could feel a misfire. If the misfire is happening randomly it may cause a check engine light to stay on and display the code P0300. Engine misfires can catch you off guard. It happens consistently; Only when it rains or the weather is cold. Intermittent misfires are the worst kind to diagnose because the misfire comes and goes depending on engine load or operating conditions. Sometimes the engine will misfire on Idle also, and your engine sensors will get faulty values, and the. Engine misfire under load I have been having trouble getting my engine to run correctly. First I got a check engine for misfire for about 2 seconds (which I barely. The engine has to be above 1000 rpm for the cam retard pid to update and be accurate. The 2002 Ford Taurus has 6 problems reported for engine misfires (stalls) when accelerating. It jerks and loses all power, resulting in a downshift. Since you replaced them, that of course was not it. Spark plugs that are worn out will cause the engine to misfire. Typically an engine misfire under load, will be a problem with the ignition system, while low engine speed problems will be a vacuum, fuel management or compression issue. I can almost assure you that you have a bad cam lobe. I wish I could make the noise for you. First I read the AFR going too lean during acceleration. A misfire under load complaint can usually be broken down into 2 categories. 04 f150 shaking when accelerating 7 Answers. Car is misfiring? Engine light flashes? I was driving two blocks away from home when all of a sudden my engine light started flashing, and car was shaking (like it had a hard time accelerating) , the only way i could keep it moving was to accelerate a little. When the vehicle was being tested initially there was no issue when starting it but a slight misfire was found under harsh acceleration. I tend to not get alarmed when i get cel's, its usually the o2 sensor lol. Here is my story. The engine may misfire and/or buck while driving at freeway speeds with no fault code stored in the powertrain control module (PCM). A lean fuel condition is one of the primary causes of misfires. This occurs mostly under light-to-moderate acceleration and the Check Engine light is not illuminated. and they cleaned the injectors, throttle body, changed the spark wires, fuel filter, and plugs ($$$$$). Starts up quick cold or hot. Everyone sees these late model F150's with the 5. High RPM misfire. 2 Engine hesitating under load. See 2012 Audi A4 / S4 technical service bulletins (TSBs) at TrueDelta, organized by model year and problem area. This is a general engine misfire. And another thing while idling can hear backfiring sound in the exhaust. A lean fuel condition is one of the primary causes of misfires. com and affiliated sites. I have a passat tdi Pd engine and i having a problem with engine shake, vibration only when idling. This moisture will cause the engine to misfire, thus your car will jerk when accelerating at low speeds. VW Polo 1999. When one or more cylinders stops firing, the power cuts, and the vehicle hesitates under acceleration. If I'm on a level surface and let it idle backwards, it does so with no problems. The misfire is clearly felt at this speed because the torque converter clutch is engaged that means the engine and transmission are considered as 1 unit so any slight misfire in the engine will be felt in the transmission and this is happening only when cruising. It happened twice last week during my ride home from work. Lightweight flywheels or crank pulleys. Always begin replacing the easiest and cheapest part first, which is the fuel filter. A seriously grimy or clogged up fuel channel can make the vehicle encounter engine misfires, lowering in power and acceleration, and notwithstanding slowdowns. you can hold brake and rev engine in "drive" and it will skip audiably (with magna-flo mufflers). She pulled over and noticed the check engine light on. When a misfire occurs, engine speed will fluctuate. W215 CL500 MISFIRE when accelerating hard at 4000rpm Discussion in ' Engine, Drivetrain, Fuel and Exhaust ' started by gt-5idhu , Jul 8, 2015. Every time its happened it has been wet and ive been though a puddle and it starts to hesitate and misfire and before long it throws up the engine warning light (yellow one not the red so you can still drive it). Engine Sputtering when Accelerating. Engine misfire at high speed, full throttle 25th September 2017, 09:13 After 8 years storage, 2 years renovation, our Stag is back on the road An absolute delight with refurbished suspension throughout, the handling and ride are superb. When I was driving up a hill on my way back,. Are you experiencing whining noise when accelerating your car to high RPM speeds? This seems to be a common problem with many cars. The mechanic is certain it's ignition related, but which part is a mystery. The "sharp" misfire, on the other hand, frequently relates to ignition problems. It has gone from a random misfire to a full time misfire. It depends on how serious the misfire is. If fuel pressure is low, first replace the fuel filter, if still low, you may need to clean the sock in the fuel tank, or replace the fuel pump. Damn misfire and shudder when accelerating Hi again folks , just wondered if anyone can help me with the continuous problem , Car hunts on tickover and when starting to accelerate mainly 3rd gear and above I get an awful lot shuddering and shaking I can accelerate through it eventually but under load at lower revs it's most violent. by Kyle McFadden. I was so frustrated I told the service manager to have my mechanic drive it home for however long it takes to figure it out. 4 in my 2001 4. Engine misfire when accelerating - Answered by a verified Auto Mechanic We use cookies to give you the best possible experience on our website. First, let's pinpoint exactly what's going on. >"but upon acceleration at high rpm it misfires. Its something like: 1. Engine starts great but misfires on number six. It always restarts, and then runs normally. Ford F150 Forum - Forums and Owners Club > Ford F150 Forum - Help Zone - Ford F150 Problems, Complaints, and Solutions > 3RD Generation Ford F150 – 1987 to 1991 Ford F150 Trucks > Powertrain – Engines, Transmissions & Differentials > 5. It starts to misfire violently and feels very hesitant. A clogged fuel filter in a Ford F-150 or F-250 truck will cause its engine to sputter and misfire. What would cause TBI engine to sputter, hesitate, skip and misfire/backfire Discussion in ' The Garage ' started by afroman006 , Dec 19, 2003. These misfires do often come under load from the engine; and you have the most load on the engine when you are accelerating on higher RPMs and higher gears. Since you replaced them, that of course was not it. the motor runs so smooth at idle and as soon as i hold the throttle steady around 1500rpm's and higher it clearly has a miss. You can see that #3 is right after #4. It's one of the most common reasons why a car jerks when accelerating. But this time the engine check light has turned on. Can speedup engine in neutral still misfires on six, but does not have a backfire sound like it does when accelerating in gear. Alright, so my Corolla is sitting at 210K+ miles and for the past year or so, the car has been hesitating at acceleration. This goes for all vortec 4. the problem started intermittantly.