Why Does My Car Hesitate on Acceleration? Restricted fuel delivery and malfunctioning spark plugs are the most common reasons for cars to hesitate during acceleration. The check engine light indicates our vehicle computer has detected a problem. The misfire is causing the hesitation; you just need to find out what's causing the misfire. You may have to register before you can post: click the register link above to proceed. All XJ Non-modified/stock questions go here - Hesitation/bucking on acceleration?? - hi all, tia for any thoughts. class action suit against Ford resulted in an award of $20. The VW diesel (TDI) engine is one tough engine capable of going 500,000 miles when maintained. I was all excited when I picked it up. Other causes may be bad or worn out components in the ignition secondary system, causing the engine to accelerate poorly and even stall. The car is hesitating/bucking under acceleration (mostly noticed under part throttle), and is very repeatable/consistent around 2500 RPMs, and will usually go away at higher or lower RPMs than that. I can be driving down the road and my truck rides fine. I have been having trouble with my 95 Mustang. We now plug in our scan tool to retrieve the code. A diesel engine in good condition should produce no visible smoke from the exhaust, under most operating conditions. The best description I can give is that it hesitates on acceleration or stumbles for a brief second then takes off. The hesitation is caused by needing a bit more fuel because it is leaning out at sudden acceleration. Then, on the same trip, she started immediately, with no problems. Also, when I step on the accelerator when engine hesitates, it doesn't respond correctly, no matter how much I press (it slowly accelerates). This issue is caused by volatility of modern fuel. I only experience the pause when accelerating from a stop. but sometimes it takes entirely too long and too much gas to get it to move faster. Mine seems to be a hesitation from around 2500-3000 rpm shortly after my TF-035 is fully spooled (at around 2200rpm) - so in my case Im guessing wastegate creep is probably a good candidate - although I may also have a slight boost leak from the turbo exit pipe. I guess it is thinking about. I take off and all is well for days and weeks. But when I am driving and I am accelerating or going up a hill the engine starts cutting out, hesitating, chugging, i'm not sure what to call it. Our 2011 Flex with the ecoboost engine is experiencing intermittent hesitation on accelerating from a stop or low speed. The slump had gone away. This morning it was -13C and even with engine fully warmed, when I would get under boost (3K~4K rpm engine under load) the hesitation would manifest itself. Jerky acceleration. 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. The Metering Rods and step-up springs are part of the Primary Main System while the accelerator pump and nozzles are part of the Transition System! The two systems can work together, but you have to tune them separately. I am having an issue with my 2012 1. It feels like (when the stutter occurs) a sudden loss of gas to the engine, and ends up "looking" like I am a newbie stick driver. accelerating to 70 perfectly fine then when the trans would shift and rpm drop to about 2k. As carburetors age, they can occasionally suffer slight air leaks and this will compound any hesitation problem caused by a 009 distributor. The problem that I am having is that when accelerating either from a stop or when moving down the road the engine hesitates or just looses power. I then did the same with the A/C on - hesitation. 2017 Silverado 1500 hesitation on acceleration I am sure this has been talked about before but I just purchased a 2017 1500 midnight edition with the 5. A mechanic has to conduct comprehensive tests to find the cause of the stumbling and to ascertain that the engine is not backfiring or missing. Ive been battling a problem recently with my 4. A vacuum gauge attached to the intake manifold reads around 7 at idle when it should be around 15. Re: 390 Hesitates on takeoff. 9 cummins, custom 4 inch exhaust, 5 inch RBP tip, injen cold air intake, airaid modular intake tube, Smarty S-06 POD set on #9, FASS 150 fuel pump, Dr. Here are some of the things that can cause your 'Vette to hesitate or surge that should be checked. Our 2011 Flex with the ecoboost engine is experiencing intermittent hesitation on accelerating from a stop or low speed. If you are trying to find Subaru Engine Hesitation When Accelerating article fails to dwell right here, you can see from several of the articles that may suit your. But when I am driving and I am accelerating or going up a hill the engine starts cutting out, hesitating, chugging, i'm not sure what to call it. 4 doesnt just get up and go immediately, but I think it might be getting worse since i started driving this truck 12,000 miles ago. 1) a hesitation or stutter when accelerating from a full stop. 5L engine, manual, approx. The problem began over the summer, but it didn't persist after I changed all of the spark plugs. This has occurs after stopping, then turning and attempting to accelerate from the stop. Hello guys I browsed different threads but couldn't find any answers. Why is the engine bogging under acceleration? I recently managed to get the moped running properly, albeit for only a short time. I think that closes this chapter. I never really felt it missing, it seems to idol smooth and run pretty good other than the "hesitation or bucking". The strange thing is that the problem disappears when I fill the fuel tank with gas and reappears when about a third of the gas in the tank has been burned. But never any engine problems. looks like it's not making good contact. It also dies when I turn the mower blade on. 9 cummins, custom 4 inch exhaust, 5 inch RBP tip, injen cold air intake, airaid modular intake tube, Smarty S-06 POD set on #9, FASS 150 fuel pump, Dr. when the car is cold and I put the engine under load, it will hesitate and the exhaust will pop. It also hesitates/stumbles on acceleration from stop. Complaints have surfaced that certain Dodge Ram vehicles are experiencing acceleration problems, including sudden acceleration and failure to accelerate. the tsb actually works for 2004-2008 similarly equipped. 4 doesnt just get up and go immediately, but I think it might be getting worse since i started driving this truck 12,000 miles ago. Subsequent restarts will produce the same problem, but it goes away more quickly than a "cold" start up. If the car starts when cold but, idles rough or does not want to stay running, this can indicate a problem with the engine. Once you get to a thousand miles, you owe me a thank you and a "yes, now I'll replace the rest of the plugs". i went to. When one or more cylinders stops firing, the power cuts, and the vehicle hesitates under acceleration. Or when the air/fuel mixture going to lean or the engine comes under load, the ignition system is weak and misfiring. I'll be going 30mph and step on the gas and it kinda hesitates, it will rev real quick then actually accelerate. SYMPTOM SUMMARY The engine hesitates when accelerating. Ooh yeah the check engine light is also on. Sometimes, you could also notice a different smell from the exhaust. So far this has been only embarrassing, but could easily become dangerous. com : Car complaints, car problems and defect information. After replacing this pump, the problem was still there,but not as bad( It sometimes used to stall on me when accelerating from a stop,after the new pump the stalling stoped) I've noticed that the hesitation is more noticeable during left and right hand turns and sometimes runs real rough under load, especially when cold. 9 cummins, custom 4 inch exhaust, 5 inch RBP tip, injen cold air intake, airaid modular intake tube, Smarty S-06 POD set on #9, FASS 150 fuel pump, Dr. When the engine is cold, the thickness of oil is greatly increased, and may not make it all the way up to the top of the valves and. ok guys it started last night while i was on my way to work. but only on take off, as if it cant handle the sudden surge of gas. Also, when I step on the accelerator when engine hesitates, it doesn't respond correctly, no matter how much I press (it slowly accelerates). Warm the engine to operating temperature. com : Car complaints, car problems and defect information. Today while I was driving I pulled up to a stop sign and kinda rolled through it in 2nd gear went to accelerate and it sputtered and backfired in what sounded like the drivers side of the engine bay. Throttle Position Sensor Description & Related Information. ill step on the gas but it wont accelerate as fast as it should be. I had put up with it for 3 yrs with my 2012 model. I have a Murray model 405000X8 13. The vehicle may stumble or stall when the accelerator is pressed or may exhibit an immediate lack of power. Our 2011 Flex with the ecoboost engine is experiencing intermittent hesitation on accelerating from a stop or low speed. Hi everyone. I was going about 45 mph. In most cases, a bad throttle position sensor (TPS) fails to signal the engine computer about throttle operation. Boat purchased in 2006 - EVERY year I have communicated to dealer a lag/hesitation with the engine when accelerating prior to getting on plane. Engine hesitation, almost by definition, usually goes back to a misfire in one or more of the cylinders. Engine Hesitation/jerking under light acceleration - S Type 3. This Feature Has A Few Second Delay Between The Time The Brake Is Released And The Engine Accelerating. The misfire is causing the hesitation; you just need to find out what's causing the misfire. 5L engine, manual, approx. The engine hesitation on your Dodge may be created by problems in one or more components. Finding out what is wrong with your car by feel, smell, look, and sound. The other day I noticed that on the way to work in the morning, my car had a very hard time accelerating (felt like it was going to stall). 9 cummins, custom 4 inch exhaust, 5 inch RBP tip, injen cold air intake, airaid modular intake tube, Smarty S-06 POD set on #9, FASS 150 fuel pump, Dr. Or it could be carbon build up in the cylinder causing a hotspot that is pre igniting the fuel. There are several common causes of engine vibration in a car, and they all result in shaking and noises that can be quite alarming and sometimes scary. The engine should start, and may run rough. This may happen because of slight (and normal). I also have a stumble upon steady acceleration around 50 mph. It has no power and seems to jerk and hesitate. When this happens, pulling the car over and restarting it solves the problem,. The best description I can give is that it hesitates on acceleration or stumbles for a brief second then takes off. There is a difference between a hesitation (bog) or a starving engine (engine falling flat at a certain RPM). the tsb applies to the 2006 5. Why Does My Car Hesitate on Acceleration? Restricted fuel delivery and malfunctioning spark plugs are the most common reasons for cars to hesitate during acceleration. If you are experiencing any of the following transmission symptoms, we recommend bringing your vehicle in for a transmission service and inspection as soon as possible:. I took it to a mechanic who drove it around and basically said he couldn't feel anything and it looks perfect. How to Fix a Car That Stalls. It's worse when I get up into 3rd and 4th gear and give it more gas. This would result in the engine being unable to produce enough power to accelerate. Someone cut out in front of me, I had to slow down fast and then needed some throttle to have the truck actually hesitate and kind of clunk like an engine does when it loses prime or fuel and then rehits. This is what I am experiencing. Replied by cap269 on topic Engine hesitation when accelerating From an old reference handbook in my shop: "Hesitation is a classic symptom of a lean fuel mixture (too much air, not enough fuel) and can be caused by a dirty or misadjusted carburetor, or one with a weak accelerator pump or worn throttle shafts. I ask for a non-sport model and I have my wife and kids with me, so it's only a short drive. i went to. Our 2011 Flex with the ecoboost engine is experiencing intermittent hesitation on accelerating from a stop or low speed. Issak Madden needs your help with “Ford CEO Mark Fields: Ford recall faulty Focus and Fiesta transmissions”. Right at this drop it. but sometimes it takes entirely too long and too much gas to get it to move faster. Hi, new to the forum and looking for a bit of help. Jerky acceleration. If I put it in neutral and rev the engine, it revs just fine. Seems like it's only happening in the RPM range I already mentioned, and since on a faster acceleration you would skip this range - there is no hesitation. A couple days ago it started running completely lousy. Had my car recently remapped and now the car goes into limp mode (with an Engine management light) whenever I put the boot down (about 3. Just cruising is fine and 100% throttle is fine, its just this light acceleration where it hesitates. I am trying to tune out a hesitation in the off idle part throttle range. My car hesitates really badly on acceleration. It has had alot of work done luckily all under warranty including a new crank shaft sensor, idle control valve,mass air flow sensor,new air & oil filters,throttle body repair,oil changes. Hesitation when accelerating 2000 Tundra. Also, when I step on the accelerator when engine hesitates, it doesn't respond correctly, no matter how much I press (it slowly accelerates). Engine hesitation when accelarating quickly Discussion in ' Gen 2 Prius Care, Maintenance and Troubleshooting ' started by Omegaphoenix , Apr 20, 2006. There is no miss just a lack of power the engine seems like it is being held back a couple of times you could feel it take off then stumble back. I first experienced hesitation on acceleration at low (10-15 mph) speeds on a slight incline when there was a little over 200 miles on the car. I would hesitate while running kind of like a half second about every 10 seconds, take off was pitiful and as far a jumping into the passing gear to haul butt you could forget that. I was going about 45 mph. After a bit of time, things seem to normalize although while cruising at highway speeds it will hesitate. Hesitation is more apparent if I apply breaks suddenly and stopped. Following is a breakdown of the labor and parts estimates. I changed the coil pack on cylinder 5 and cleared the code from the computer. Check Engine Light On/hesitation & shaking while accelerating and idling. 9 liter 105k miles. We're not talking about a knocking engine or one that idles rough or stalls. This is a known issue with both vehicles. 0 - MY 03 If this is your first visit, be sure to check out the FAQ by clicking the link above. A vehicle that struggles or hesitates to accelerate may be unpredictable and moments of hesitation may be coupled with equally dangerous moments of surging or unexpected acceleration. It's only when the engine is under load. They said it had miss fire codes on every cyclindar. RE: What is causing my 2001 BMW 325i E46 to have jerking, hesitation type loss of power on acceleration? My 2001 BMW E46 325i is having loss of power while accelerating. That power comes from the systems that control the fuel and airflow supply. If it was bucking and spitting when the pedal is to the metal going up hill, then that would be a fuel delivery problem. I would hesitate while running kind of like a half second about every 10 seconds, take off was pitiful and as far a jumping into the passing gear to haul butt you could forget that. When I press on my gas pedal, say after making a right turn, the car feels like loss all power and then it instantly gains it back and continues to accelerate right after. Hey guys, im driving a vios and for the past few weeks, my car will start to hesitate especially when i accelerate hard from stop. stumbles on acceleration, WHEN COLD, idles fine, usually GRRR this is really pissing me off! Okay, the car is a '89 SE-i with a K&N stock replacement air filter. My first guess , based on the the symptoms is accelerator pump or what ever does that job on scooters. Why does my car accelerate slowly when I press the gas? the car is moving, but it’s ridiculously slow and you can tell that the engine is struggling to keep up. The engine hesitation on your Dodge may be created by problems in one or more components. THen all the sudden it will kick right in, take off, die off again. Once fully warmed up, I have no issue. This Site Might Help You. So, now I have a tendency to always throttle up severely to avoid getting annoyed with the car. The engine knocks or pings. 1966 inline 6 engine bogs down and stalls out when accelerating from a start This topic looks it has been talked about alot, but I just can't fix it. Engine Hesitation when accelerating was created by Cloudsiv Hi guys,my car hesitates to accelerate when I press down on my gas pedal. This is a general guide which will list symptoms for 944 starting and running problems and common causes of those problems. When I would press the accelerator lightly, there was no response as if the engine died. 3 Litre hesitates when accelerating at serveral different speeds, mostly noticable at lower speeds. There is a difference between a hesitation (bog) or a starving engine (engine falling flat at a certain RPM). It also tends to be most noticable when accelerating at a corner from a stop. that is what will cause excess deposits. When This Happens While Pulling Into Traffic It Could Cause An Accident. Quick follow up, ran some additional up hill acceleration / flat out acceleration tests with additional people in the car, three guys ( ~600lbs extra weight ). The Metering Rods and step-up springs are part of the Primary Main System while the accelerator pump and nozzles are part of the Transition System! The two systems can work together, but you have to tune them separately. Sometimes we experience an annoying hesitation or stalling when we are cruising in our cars and decide to accelerate either slightly or harder. 0 XLT and let me just say I've tried what I could think of and luck just hasn't been on my side. Might be the case. 2L engine built before VIN 5F132617. RE: What is causing my 2001 BMW 325i E46 to have jerking, hesitation type loss of power on acceleration? My 2001 BMW E46 325i is having loss of power while accelerating. They said it had miss fire codes on every cyclindar. WOT from complete stop ; Transmission in full automatic; I have watched the behavior closely. From what I have read in a few places it sounds like the turbo charger(s) may be the cause. Most carburetors use a piston or diaphragm type pump. But, if I drive for about 2 hours in a congested road with frequent stops, engine starts to hesitate when idle and even stall sometimes. If all of the above is not the root problem that cause your car hesitates when accelerating, you might have to send it to a trusted mechanic and tune the engine. My 2011 Prius 4 has developed a noticeable hesitation or jerk when the power indicator crosses the center line during a slight acceleration. Corvette: Why is My Car Hesitating? The Corvette is a very powerful car, and when it hesitates, we feel it. My first guess , based on the the symptoms is accelerator pump or what ever does that job on scooters. hesitation and stuttering. The first step to identifying the cause of this is to find out if the car is fuel-injected or if it has a carburetor. My car engine hesitates when I accelerate! Another thing is that gases may reverse back from the engine through the intake manifold all the way to the MAF sensor, like when a backfire happens, covering the sensor elements with a very thin carbon soot film, affecting its performance. It was discussed a while back on this forum when people first started picking up the S550. Why Does My Car Hesitate on Acceleration? Restricted fuel delivery and malfunctioning spark plugs are the most common reasons for cars to hesitate during acceleration. The spark plug wire has a burned area where the spark has been jumping to the engine cover, never making it to the spark plug. However, it has its issues. I am still getting the hesitation and stumbling when accelerating from a cruising speed, and when going up hill. versa sedan and versa note; engine turns off or hesitates when accelerating from a stop during hot ambient temperatures (+100°f) This bulletin has been amended. Insufficient burning inside the engine will make the car hesitates or jerks when driving. Vortec Engine Problems (Hesitation / Bogging) It will loose power when at speed and when accelerating. Re: Hesitation when accelerating hard Some of the merc's came with carbs with insufficently-sized accellerator pumps, that even though are working still don't squirt enough gas. Dodge Dakota Forum for Dodge Dakota trucks with an interactive site including Dodge Dakota Forums, Pictures, Links, Message Boards, and Chat Forum. Finding out what is wrong with your car by feel, smell, look, and sound. Hesitation when accelerating Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine. the tsb actually works for 2004-2008 similarly equipped. 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. I can try that, Seafoam has been pretty good stuff in the past for my generators, but I am going to start calling Honda dealers today. Subsequent restarts will produce the same problem, but it goes away more quickly than a "cold" start up. Also, when I step on the accelerator when engine hesitates, it doesn't respond correctly, no matter how much I press (it slowly accelerates). the tsb applies to the 2006 5. I have almost been hit becuase of this. Engine now revs cleanly from idle up to redline, without stumbling / hesitation / misfiring. Ive been battling a problem recently with my 4. I took it to a mechanic who drove it around and basically said he couldn't feel anything and it looks perfect. It is like it is hauling ass but going. When entering a low speed moment (as in turning a corner) and then accelerating out of the turn, the engine hesitates significantly before it accelerates. I guess it is thinking about. My first guess , based on the the symptoms is accelerator pump or what ever does that job on scooters. Have put on a fuel filter with no apparent improvement. The 2018 Hyundai Tucson has 3 problems reported for hesitation when accelerating from a stop. Carb was replaced, yet, still have prob. On many of these year vehicles there is a plug in connection inside the tank at the top for the fuel pump. Things were looking up: I replaced the spark plug, cleaned out the exhaust, adjusted the idle / fuel screws, and even replaced the brakes (I can stop now!). Basically it happened twice. Most people do two things to try to correct this (both cause the problem to get worse), either they richen the idle mixture or they increase the accelerator pump shot. Re: 390 Hesitates on takeoff. Hi, new to the forum and looking for a bit of help. I have been having trouble with my 95 Mustang. My check engine light is not on. I don't know $&!( about cars, but I know a bit of common sense. My first guess , based on the the symptoms is accelerator pump or what ever does that job on scooters. Engine hesitation accelerating Does anybody have any idea why I would be getting engine hesitation on light to medium acceleration? I know the 6. I took it to a mechanic who drove it around and basically said he couldn't feel anything and it looks perfect. Car hesitation is a symptom that shows an imperfect internal combustion in your engine. when my ca18det is cold, it idles ok, but if i give it any gas it tries to die until after it warms up a bit, after the gauge moves a bit, i can give it gas and it only hesitates if i floor it, but if i try to drive it bucks and backfires until 3000 rpm, then after then, pulls fine, no hesitation. You’ll probably see a slight voltage drop (less than. Here's what you might discover—and what you can do to fix the problem: Dirty air filter. There are many things that could cause a car to stall, with solutions ranging from simple to complex. It idles fine, I can coast at speed just fine it only happens when I'm accelerating. I have the same issue, mine hesitates at lower speeds when you increase speed from 40-50MPH it feels like the engine misses, hesitates, bucks and jerks the entire truck. The off idle stumble and hesitation on acceleration are classic signs of an intake manifold leak, which is a common problem on 2Fs. Carb was replaced, yet, still have prob. In my opinion, the full cut-off is being engaged because the engine runs to redline before it shifts to 2nd gear. 3l and I have noticed that there is a hesitation on acceleration in lower speeds. I also have a stumble upon steady acceleration around 50 mph. Acceleration is not smooth, and heck the speedo needle even turns in a jerky manner. Something to do with the engine needing to burn off all fuel in the cylinders when the throttle is let off or the car comes to a stop. But when I am driving and I am accelerating or going up a hill the engine starts cutting out, hesitating, chugging, i'm not sure what to call it. I was told the bad hesitation during acceleration was fixed. I've had a lot of theories of what it might be. , Hesitation, Accelerating. Monitoring your engine vacuum does it. Have encountered this cold "bog" and have determined it is not the spark plugs or fuel pressure but the wires. 7 4x4 with 180k miles has been "sputtering" lately - particularly going uphill and on gradual acceleration. There is an updated carb/pump. PROBABLE CAUSE Winter-grade fuel together with warmer ambient temperatures causes carbon to build up on the intake valves. Had her stabled when I lived in HI for the last four years. But there is a hesitation when the pedal is pushed down and the acceleration is rather slow. Have changed the plugs, leads, fuel, oil and air filter. any ideas please?. 2017 Silverado 1500 hesitation on acceleration I am sure this has been talked about before but I just purchased a 2017 1500 midnight edition with the 5. The air mixes with the fine spray of fuel inside the engine and is then lit by the spark plug, causing a controlled explosion, which moves the pistons. My Ford Escape 2014 hesitates when accelerating on the highway sputters Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix with Ford. Subsequent restarts will produce the same problem, but it goes away more quickly than a "cold" start up. When you go to step on the gas pedal to accelerate, you will suddenly feel like the power has been lost in the engine for a couple of seconds. 0 - MY 03 If this is your first visit, be sure to check out the FAQ by clicking the link above. Does anybody have any insight on what this may be? I have been searching the web all day and cannot really find a person whos car had all the same symptoms as mine. As carburetors age, they can occasionally suffer slight air leaks and this will compound any hesitation problem caused by a 009 distributor. I have a 2003 Dakota that has a throttle hesitation when first starting up. Sometimes, I get a lot of email complaining about engine hesitation when accelerating. I have noticed that it tends to happen on damper days, but not always. It has been getting progressively worse over time. the tsb applies to the 2006 5. You may have to register before you can post: click the register link above to proceed. Occasionally, while accelerating, RPM at approx. I am still getting the hesitation and stumbling when accelerating from a cruising speed, and when going up hill. We replace the wire, road test the vehicle to confirm the repair and finally clear the code from the computer. The code i keep getting is p1491, it's the EGR valve lift. I guess it is thinking about. It is better now than it has been, but still very anoying! The only other thing that I can possibly think of is that the cat/cats are blocked/plugged and need to be replaced. Insufficient burning inside the engine will make the car hesitates or jerks when driving. The F300 on my 2011 Grady has a bit over 400 hours on it. Re: Hesitation when giving 'er the throttle I have the same engine, 1984 model, with the same issue. I took it to a mechanic who drove it around and basically said he couldn't feel anything and it looks perfect. Below are the 11 most common reasons for a car or truck losing power when trying to accelerate:. I ask for a non-sport model and I have my wife and kids with me, so it's only a short drive. The car is bogging on and off and there is a bad hesitation on the acceleration. class action suit against Ford resulted in an award of $20. If there is a low level of compression, there will be a low level of power being generated by the engine. Replacing it is worth the money, however go to autozone. I only experience the pause when accelerating from a stop. It also dies when I turn the mower blade on. The check engine light did not come on at all. That power comes from the systems that control the fuel and airflow supply. I have a 2003 Ford e-150 cargo van, 4. It is better now than it has been, but still very anoying! The only other thing that I can possibly think of is that the cat/cats are blocked/plugged and need to be replaced. Acceleration is not smooth, and heck the speedo needle even turns in a jerky manner. This happens in 2nd and 3rd gears. I am trying to tune out a hesitation in the off idle part throttle range. But there is a hesitation when the pedal is pushed down and the acceleration is rather slow. When a vehicle is hesitating during acceleration, it should be inspected by a mechanic. I had put up with it for 3 yrs with my 2012 model. Or when the air/fuel mixture going to lean or the engine comes under load, the ignition system is weak and misfiring. I'll be going 30mph and step on the gas and it kinda hesitates, it will rev real quick then actually accelerate. Hesitation when accelerating Last Sunday we took the boat out and surfed for about 3 hours and then on my last pull the engine started to hesitate when accelerating. I am having the acceleration hesitation issue, but it is somewhat different than what others have described in this post. Engine hesitation accelerating Does anybody have any idea why I would be getting engine hesitation on light to medium acceleration? I know the 6. when my ca18det is cold, it idles ok, but if i give it any gas it tries to die until after it warms up a bit, after the gauge moves a bit, i can give it gas and it only hesitates if i floor it, but if i try to drive it bucks and backfires until 3000 rpm, then after then, pulls fine, no hesitation. Things were looking up: I replaced the spark plug, cleaned out the exhaust, adjusted the idle / fuel screws, and even replaced the brakes (I can stop now!). That's usually termed as "stumble and hesitation," and it can be maddeningly difficult to pin down. I just took it on an 8 hour trip and it ran fine until the last hour of the trip it bogged and did not want to accelerate. Hesitation Definition - An engine hesitation is an interruption of continuous power during acceleration. The accelerator pedal appears useless for 2-5 seconds, then finally after pumping the accelerator a couple of times, normal reaction, the engine begins to accelerate and. I also have a 2004 330Ci with the same type of throttle hesitiation at about 3000 rpm under acceleration. I can feel the hesitation and 1 time when I ease up on the gas, the engine brake on me and slow the car way down which completely caught me by surprise. Have changed the plugs, leads, fuel, oil and air filter. Logically you would think it has something to do with the choke, but I don't know what to check. I can start it cold at the house and it will run fine for the first 20 or 30 miles. Below are the top 7 common causes for a vehicle losing its power when accelerating it. So, keep try keeping all parts of the engine clean and oil them regularly. Also, when I step on the accelerator when engine hesitates, it doesn't respond correctly, no matter how much I press (it slowly accelerates). SOURCE: 2004 dodge caravan 2. Check Engine Light On/hesitation & shaking while accelerating and idling. When my 2010 RT SE5 engine is fully warmed up it will sometimes start to shutter and hesitate during acceleration (under load). Ok, so the engine light finally came on and I took it to a shop to have them run a diagnostic on the car. The car is bogging on and off and there is a bad hesitation on the acceleration. Vortec Engine Problems (Hesitation / Bogging) It will loose power when at speed and when accelerating. The new engine was complete with new turbo and new ancilliaries (alternator, AC compressor etc) When I collected the car, for 1 day it was fine, but on day 2 (after 50 miles on the new engine) it started detonating under partial load again in exactly the same way before the last engine was destroyed. Sometimes we experience an annoying hesitation or stalling when we are cruising in our cars and decide to accelerate either slightly or harder. When entering a low speed moment (as in turning a corner) and then accelerating out of the turn, the engine hesitates significantly before it accelerates. Lets say,while travelling at approx. Let's run through a few possibilities. 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. PROBABLE CAUSE Winter-grade fuel together with warmer ambient temperatures causes carbon to build up on the intake valves. Today while I was driving I pulled up to a stop sign and kinda rolled through it in 2nd gear went to accelerate and it sputtered and backfired in what sounded like the drivers side of the engine bay. common problem that Ford has gone to great lengths to deny and bury. The problem that I am having is that when accelerating either from a stop or when moving down the road the engine hesitates or just looses power.