Q: Car revs and accelerates without the gas pedal being pressed

asked by on

As I was driving my car down the street, I noticed that it began to feel weird after about three minutes into the drive. While stopped, with my foot on the brake, I could hear the car engine revving as if I was trying to accelerate the car. It happens at 2 second intervals in between. With my foot off the brake, the car starts to accelerate itself to 20 mph in a fashion similar to using cruise control going uphill.

My car has 172600 miles.
My car has an automatic transmission.

This is a common problem when the idle air control module is not functioning as it should. This is a component that helps to monitor air/fuel mixture at idle speed. When this is not working properly, this causes an imbalance in the air/fuel mixture resulting in intermittent or abnormal idling as you’ve described. This could be a known problem by the manufacturer so you may want to contact the dealer to see if this is anything that is covered. If you would rather not get in touch with the dealer, I would recommend having an expert from YourMechanic come to your home to diagnose the revving concern and proceed with proper repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car revs and accelerates without the gas pedal being pressed

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: When I am accerlerating, I feel a vibration.

Hello there, many faults will cause your 2004 Ford Taurus to have a vibration in the gas pedal. It is good that you referenced where the vibration is coming from, as this varies what will cause it. The most likely...

Q: Q: Crankshaft position sensor

If prior to the work, no diagnostic trouble code was set (i.e., check engine light was not on) identifying a fault with the crankshaft position sensor, then the likelihood is they caused the problem. In any event, once the "cause"...

Q: Where are the cam sensors located on 2009 Nissan Maxima vq35de engine? 2009 Nissan Maxima

Hello - the cam position sensors for this engine (2) are each located near the passenger side end of the cylinder head for each cylinder bank. The engine cover must be removed to access them, and the factory sensors have...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.