Skip the auto shop - Our mechanics make house calls

Q: Accelerating and idle problems

asked by on

It was fine one day and the next it started sputtering and hesitating at take off and wouldnt accelerate right away. Its been 2-3 weeks and it has gotten worse. Now its even doing it while driving too, not just taking off.

Now almost every time I press the gas pedal it sputters, rpm's jump around and car doesnt want to accelerate, and has even backfired even while on highway. While stopped and in gear Drive the idle randomly drops and wants to die but idle fine while in neutral. As soon as I put it in gear, the idle drops to around 500-600 rpm's After owning the. Car 3 years. Suddenly started blowing the fuse for stereo and interior lights when I tried to use power window. And now my lock button on the door stopped working but keypad still works. PLEASE HELP ME I am low income and my only transportation to work for me and my 3 kids

My car has 274000 miles.
My car has an automatic transmission.

A: This is a common sign of a failing idle air...

This is a common sign of a failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine. This valve is controlled by the vehicle's computer which will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed. This is all done by the idle air control valve. When the engine RPM drops below the normal range of 750-800 RPM (for most cars), this may indicate a dirty or faulty idle air control valve. In cases where this valve is dirty or failing, your vehicle may stall instead of slowing to an idle after the release of the throttle. Your power window problem may likely be related to a potentially shorted wire or bad connection to your [power windows] https://www.yourmechanic.com/services/power-window-switch-replacement I would recommend having an expert from YourMechanic come to your location to [diagnose and repair your idle air control valve] https://www.yourmechanic.com/services/idle-control-valve-replacement.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: When I put it in reverse it is stalling

If you car only stalls when you shift into reverse and not when you shift to any forward drive gear, then you may have an internal leak in the valve body and when you shift into reverse, the transmission is...

Q: Car hesitates when accelerating from stop.

You do not mention a check engine light is on so a computer sensor may or may not be the cause. The throttle body, air filter or fuel filter may be dirty and restricting air or fuel into the engine....

Q: Clanking sound beneath car

A clanking sound under the car, especially from the front wheel area over bumps can be coming from a worn stabilizer link or even a faulty strut mount. Chassis ears may need to be used to determine the exact source...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.