Subaru stutter during acceleration

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Subaru stutter during acceleration

Tell us when to meet you at your home or office. Continue with your day while our mechanic fixes your car onsite. You pay only after the job is done. It can be frustrating for any driver to expect certain acceleration from their vehicle only to find that the vehicle seems to be hesitant while speeding up. This hesitation could be potentially dangerous in situations like entering and exiting the highway from an off-ramp, where acceleration may be necessary to merge with traffic.

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. When a vehicle is hesitating during acceleration, it should be inspected by a mechanic. A vehicle with a combustion gas or diesel engine requires an exact mixture of fuel and air to run efficiently. If this mixture is thrown off in any way, it may result in an engine running too lean not enough airor too rich not enough fuel.

If you notice some symptoms like hesitation, you should have your vehicle inspected immediately.

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A vehicle with a failing mass airflow sensor may also stall soon after starting. Fuel Pump: The fuel pump in most modern vehicles sits inside the fuel tank and pumps fuel up to the engine.

If a fuel pump cannot provide the correct pressure, fuel may have difficulty making it to the engine. A vehicle that hesitates while accelerating or while driving up a hill may have a weak fuel pump. The computer may then not provide the engine with the correct amount of air while accelerating, causing a hesitation sensation.

Fuel injectors may become dirty over time and not be able to provide as much fuel to the cylinder as is needed.

Subaru Impreza Engine hesitates during acceleration Inspection at your home or office.

Dirty fuel injectors may cause the engine to run lean which will in turn, cause hesitation when accelerating. A top-rated mobile mechanic will come to your home or office to determine the reason why your vehicle is hesitating while accelerating. The mechanic will then provide a detailed inspection report outlining the nature of the hesitation and the cost of any repairs that need to be made. Once the mechanic gets this information they can begin to fix any potential issues.The vast majority of owners experiencing this problem have reported that Subaru has not been able to find the cause of the engine hesitation, or fix the problem.

Especially because this is a potential safety defect, we are flagging the Outback as a model year to watch out for. I bought this Outback used from Heritage Subaru in Catonsville. It ran great during the test drives, no problems. The morning after I bought it I started it up and it hesitated so badly as I backed out of my drive way I wasn't sure I would get to the street.

Once out I put it in Drive and headed up the street, it hesitated again. Every time I tried to accelerate it gave me a 2 to 3 sec pause. It seemed to be worse Turning in to traffic from a stop. It seems to get better as the engine warms up. There are times when driving on residential streets at low rpms it acts like it only firing on three cylinders.

At highway speeds the car runs fine. There have been several days when it ran fine. Usually it runs like crap. I've had it in for repairs at Heritage Subaru, on Rt 40 in Catonsville.

They claim they can't even get it to duplicate the behavior. They calm they have run it through every test they've got but since it doesn't hesitate when they drive they can't fix it. I have had this same problem previously and took it to the dealer. They could not find what was causing the problem. This is a serious problem which could lead to serious injury or death. The US government should demand a recall from Subaru to fix this problem which many Subaru owners are experiencing.

I see an opening in the trafic and with plenty of time to merge I go and the car doesn't it just eases out but will not go Then it takes like a bat out of Hell.

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Very annoying in a parking lot or when turning left on a busy street I have spoken to the service writer at the dealer and they are aware of other complaints but no recalls have come forth.

This is a very dangerous problem We noticed the hesitation immediately but I wrote it off to bad fuel. However the hesitation continues and Subaru continues to deny or ignore the issue. Now I see it is a national epidemic.

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Too bad because otherwise it's a nice car. BUT, this has almost gotten me and my wife hit and ran over on multiple occasions. I find that often, when I accelerate and let off as changing my mind to not pass then accelerate again, there is nothing there.

The car simply won't respond. I suspect it is a costly issue and the manufacture will only step up when the lawsuits are painful. Too bad, I thought Subaru was different. So they say.

I wanted another Chevy Tahoe Looks like I'll get my wish. Had a Subaru Outback Limited for 10 years.

Never had a problem.Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

subaru stutter during acceleration

Average rating from customers who received a Engine hesitates during acceleration Inspection. Learn More. It can be frustrating for any driver to expect certain acceleration from their vehicle only to find that the vehicle seems to be hesitant while speeding up. This hesitation could be potentially dangerous in situations like entering and exiting the highway from an off-ramp, where acceleration may be necessary to merge with traffic.

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. When a vehicle is hesitating during acceleration, it should be inspected by a mechanic.

A vehicle with a combustion gas or diesel engine requires an exact mixture of fuel and air to run efficiently. If this mixture is thrown off in any way, it may result in an engine running too lean not enough airor too rich not enough fuel. If you notice some symptoms like hesitation, you should have your vehicle inspected immediately. A vehicle with a failing mass airflow sensor may also stall soon after starting.

Fuel Pump: The fuel pump in most modern vehicles sits inside the fuel tank and pumps fuel up to the engine. If a fuel pump cannot provide the correct pressure, fuel may have difficulty making it to the engine. A vehicle that hesitates while accelerating or while driving up a hill may have a weak fuel pump.

The computer may then not provide the engine with the correct amount of air while accelerating, causing a hesitation sensation. Fuel injectors may become dirty over time and not be able to provide as much fuel to the cylinder as is needed. Dirty fuel injectors may cause the engine to run lean which will in turn, cause hesitation when accelerating. A top-rated mobile mechanic will come to your home or office to determine the reason why your vehicle is hesitating while accelerating.

The mechanic will then provide a detailed inspection report outlining the nature of the hesitation and the cost of any repairs that need to be made. Once the mechanic gets this information they can begin to fix any potential issues. If the mechanic believes that the mass airflow sensor has gone bad or is failing, he or she will first examine the sensor for any superficial damage. The mechanic will also ensure that the sensor is wired correctly and that no damage has been done to the wire harness.I own a Subaru Outback 6cyl wagon.

To a non-mechanic, it feels like the fuel supply is sputtering. We have had it to the mechanic 5 times 3 times to Subaru dealer and, of course, the problem will not showcase itself during these visits.

Only once did the check engine light come on, and that reported a possible problem with the throttle position sensor. Please help. This car is not safe to drive and we have an upcoming vacation planned. Has the fuel pressure been checked? Intermittent, Oh my lord. Finally someone who knows what I have been going through!!! I have been dealing with this exact same problem for over 6 months and 3 week long trips in to the dealer. I have the extended warranty so they have been doing all my work.

The sputtering most of the time can be very mild to the point that I feel that my mind is playing tricks on me. But I know that I am losing power. I live in southern california and drive the freeways everyday to work. They tell me they have done everything to diagnose it. The last two times they replaced the EGR and my battery. The last time it lurched to a halt on the freeway and the check engine light came on the first time that had happened.

What fault code did you get specifically? Since this post have they figured out the problem? Please please please help… I am at my wits end. The computer fault code was PO? Hope this helps. What happened when it would begin to sputter and you gave it more gas? Mine lurches worse when I do that. It only seems to get a bit better when I let off the gas and then try again. Did they clear your computer when you took it into the mechanic?

I have no idea if they cleared the computer.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. It only takes a minute to sign up. Subaru 2l auto tip tronic. It seems to hesitate or have slow or lack of power when you accelerate slowly.

Just resolved a similar problem on '03 Forester 2. Car would not respond for 2 to 3 seconds when the accelerator pedal is pushed. Also, when it finally kicked in it lacked power.

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I did not take it in until check engine light came on for O2 sensor After explaining problem to mech he said it was either the fuel pressure regulator or the fuel filterI took the opportunity to replace spark plugs, air filter, oil, oil filter, and a very dirty fuel filter which I believe was the culprit in my caseand of course a very expensive O2 sensor.

Car drives like new again Since the initial problem of slow acceleration did not produce a check engine light I was reluctant to mess with any of the other sensors. If all that is sorted out, look for fuel pump issues, or sensor errors although you did not mention a check engine light.

I have a Outback that had the same symptoms. There are just two screws that hold it in to the intake, so it is a quick operation. I had the same problem in my Forester xt automatic.

Also the engine light was on for about a half a year. The car would first hesitate a lot to accelerate and a couple a day ago did not accelerate up a hill. My local mechanic said it could be two things: the flow meter sensor next to airfliter or the throttle sensor. To check the flowmeter it is very easy, just disconect the plug. I did it and the car runs prefectly so I know it is the flowmeter.

Also, I had a p code before. If the problem is still present, it is the throttle sensor. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Hesitation or low power at slow acceleration Ask Question.

Asked 8 years, 9 months ago.

subaru stutter during acceleration

Active 3 years ago. Viewed k times. Shane Shane 61 1 1 gold badge 1 1 silver badge 2 2 bronze badges. Can you give us any more information? Does it always do this or only at certain times?

Does it make a difference where in the rev range it is or what gear it is in?

subaru stutter during acceleration

What about whether the engine is hot or cold?My Subaru Legacy 2. On one occasion the sputtering was completely gone for about 10 minutes while driving in city traffic, even at very low rpms. The "check engine" light turnes on sporadically already since about two years during various driving conditions without sputtering or any other noticeable signs.

Since then my Subaru dealer has checked the error code several times and consistently identified code 26, which is evidently the TMAP sensor. At the time there were no noticeable problems, so no repairs were done.

Any advice would be greatly appreciated. Michael answered 8 years ago. Subi answered 8 years ago. Check your spark plug tubes. Mine was doing the same thing, and they had to be replaced. The seals were letting a little oil get to the plug. The funny part was, out on the highway running 65 or so, it ran perfect. I didn't take the oil leak in the spark plug well serious, until flames came out of it while driving.

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I was very lucky to notice the fire just in time to put it out, so that only the battery and a few cables were damaged.

I then replaced the leaky valve cover gasket and the spark plug cables on the driver side in order to avoid any chance of a fire hazard, which at the same time eliminated the sputtering.

So to my surprise the problem had indeed just been a weak spark caused by oil leaking into the spark plug well. Thanks for all the support. David answered 8 years ago. I would also check the knock sensor. The knock sensor will retard the timing of it detects a knock in the engine. I had a 97 outback and upon doing research, I came to find that the knock sensors will start acting up as the engine mounts start to wear. The cheap and easy fix is to unbolt the knock sensor from its location and relocate it to another threaded bolt hole on the block that is just above and to the rear rear being towards back of car from the original placement.Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

Average rating from customers who received a Engine hesitates during acceleration Inspection. Learn More. It can be frustrating for any driver to expect certain acceleration from their vehicle only to find that the vehicle seems to be hesitant while speeding up.

This hesitation could be potentially dangerous in situations like entering and exiting the highway from an off-ramp, where acceleration may be necessary to merge with traffic. 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.

When a vehicle is hesitating during acceleration, it should be inspected by a mechanic. A vehicle with a combustion gas or diesel engine requires an exact mixture of fuel and air to run efficiently. If this mixture is thrown off in any way, it may result in an engine running too lean not enough airor too rich not enough fuel. If you notice some symptoms like hesitation, you should have your vehicle inspected immediately. A vehicle with a failing mass airflow sensor may also stall soon after starting.

Engine Stuttering During Acceleration - AskDap Episode 23

Fuel Pump: The fuel pump in most modern vehicles sits inside the fuel tank and pumps fuel up to the engine. If a fuel pump cannot provide the correct pressure, fuel may have difficulty making it to the engine.

Hesitates When Accelerating

A vehicle that hesitates while accelerating or while driving up a hill may have a weak fuel pump. The computer may then not provide the engine with the correct amount of air while accelerating, causing a hesitation sensation. Fuel injectors may become dirty over time and not be able to provide as much fuel to the cylinder as is needed. Dirty fuel injectors may cause the engine to run lean which will in turn, cause hesitation when accelerating.

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A top-rated mobile mechanic will come to your home or office to determine the reason why your vehicle is hesitating while accelerating. The mechanic will then provide a detailed inspection report outlining the nature of the hesitation and the cost of any repairs that need to be made.

Once the mechanic gets this information they can begin to fix any potential issues.


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