Monday, January 26, 2015

Car Stalls When Accelerating

A car that stalls when accelerating is cause by the following reasons, when car stalls during cold rainy mornings with a cold engine, the problem is moisture on a distributor cap.
As you may not aware, during the night, condensation forms on the inside of distributor cap because of cold and wet weather. This moisture allows electrical current inside the distributor cap that leads to engine misfiring, this is more severe when accelerating enough to cause the car to stall. However, the formation of moisture inside the distributor cap can be avoided by parking the car inside a garage for the night if you expect to have a wet weather during the night.

When the car stalling is gradually frequent as the first time it was happened, the possible cause is that the car is suffering from a vacuum leak. Vacuum leak often start out small and gradually becomes worst due to pressure inside the car engine.

The vacuum created in the car fuel system is one of the key factor in determining how much fuel the car engine will get, any leak in the car fuel system vacuum will affect the air/fuel mixture that enters the car engine combustion chambers, this will result to car stalling.

In this case you do not have any option but to bring the car to a reputable auto repair shop and ask the mechanic to check the car for a vacuum leak, particularly the EGR and the PCV valves, as this two items are often to be the source of vacuum leak.

When car stalling is not gradually become frequent over time and also occurred not only during cold wet weather, the only possible problem of the car is a bad throttle position. Fuel injected engines have a throttle position sensor, a device which measures how far a driver pressed the gas pedal and thus the throttle. The position sensor feeds the data to the engine computer that does the calculation the resulting data is used to determine precisely how much gas the fuel injection system should inject into the engine. If the throttle position sensor provides a wrong data to the engine computer it will adversely affect the injection of gas into the engine causing the car to stall when accelerating.

Bring the car to a reputable shop and ask the mechanic to check your car throttle position sensor and repair if necessary to avoid making the car stalls while accelerating.


  1. WHat if, after the stall, the engine cannot be restarted for about 15 minutes. The engine cranks, but does not start. After waiting, the engine starts, the vehicle runs as if nothing had happened.
    Replace the (dot) with a .

  2. my car is toyota corolla gli (efi) 94 model, ive been experiencing engine stalling during called start even if not cold wet weather but if the engine gets hot the vehicle runs if nothing had happened. Pls advice....

  3. Hi, thanks for the visit, regarding your car problem please checkout this article Car Not Starting When Car Engine is Cold

  4. My 81 cutlass has a 5.0 Liter V8, when I have the car in neutral or park I can "gun" it with no problems, but in drive I have to press the accelerator more slowly or it will struggle and/or die...any ideas...?

  5. Driving a 93 GMC Sierra single cab with a 5.7 liter v8 engine New plugs New wires New Cap and rotor, Fine at idle speed and everything Revs Perfect but dies or MAJOR hesitation when accel. almost seems to shut off...when i am driving at about 55 starts to Back Fire like no tomorrow and loses complete power and almost dies.

  6. Check your exhaust

  7. In hot or cold weather, every morning or evening (when the car has been sitting at a place for some time) - car starts normally, but if put it in gear & accelerate without leaving it in idle for at least a minute or so after starting the engine, engine stalls. In fact even if I just put it in gear without leaving it in idle for sufficient time, I can see hear the engine weak and struggling. But if I leave it in idle for about a minute or so and then drive, no issues after that. It is a 2000 corolla with about 125k miles and has all 4 new iridium spark plugs since last year. And also ever since I had a missing gas tank cap last year, the check engine light keeps coming and going. Engine does consume some oil if I go at higher speeds. If I stick to around 50-55mph, no significant consumption.I keep experimenting with different thicker/synthetic oils but this problem seems independent of whatever oil type I use. Any inputs would be appreciated. Thx.

  8. I have a 04 VW GTi 1.8T auto with the sport shifter - i'm having problems when trying to shift out of first gear (go over 10mph) because the car stalls out, revs up but doesn't jump into gear. I've noticed that I can prevent this from happening half the time by warming up the car for at least 40 minutes before attempting to drive. It's still rough at stop lights and jumps into gear, also around turns it slips out and jumps back into gear.

  9. Hi, thanks for the visit. Regarding your problem, If the problem occurs frequently then it may be a case of a vacuum leak if this occurs not more often then the possibilities is that it has faulty accelerator pump, in either case bring the car to auto shop for checking, if you suspect a vacuum leak base on the diagnosis ask the mechanic to check the EGR and PCV valves however if the problem is the accelerator pump have it check including the entire carburetor.

  10. hi i have a toytoa 2e we just replaced the engine and it ran amazing we went a fueled up and when we got to the end of the road it died. now it idles fine put when put foot down the revs come up and then it dies. if you keep pumping the gas pedal it will react but if your to hold the pedal down in any point it will die but will return to idle?????? any ideas be awsome

  11. hi,

    i have an 09 corolla and i've been experiencing weird accelerating and braking problems. My car has stopped letting me accelerate, while the rpm shot up and mph locked at like 20. If i turn it off and turn it back on it runs normal again but my engine light turns on. Sometimes when i'm driving the car sounds like it's pushing but nothing changes on the mph or rpm. It's like i'm accelerating but nothing is happening. My car has also shut off while the battery was still running by itself.

    It said there was a pedal position sensor issue, i changed the wiring harness, but this is still happening. Any idea on why???


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