Skip the auto shop - Our mechanics make house calls

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?

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
  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: Leaking water pump new Honda pump at 134000!! Any suggestions besides changing the pump

I never recommend using a "fix-in-a-can" or a "stop leak," as this can add sludge to your engine. You may just have a faulty gasket for the water pump or even a faulty water pump. In either scenario, the valve...

Q: Car fans stopped working

The fans on your car work together together and get the power and control from the fan module on top of the radiator. If one fan is working but not the other then that fan motor would need to be...

Q: Car will not start but the dash lights turn on.

Often when a battery has a bad/damaged cell internally, it may not accept a jump start. The easiest thing to do would be to replace the battery with a known good battery, whether temporarily swapping one from another vehicle or...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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.