Skip the auto shop - Our mechanics make house calls

Q: On the highway it increases acceleration.

asked by on

When I come to a complete stop RPM is running at 2. Once I taken my foot off the brake it takes off fast.

My car has 223458 miles.
My car has an automatic transmission.

It sounds like your engine’s idle speed is way too high. It is possible that your throttle cable may have gotten stuck on something that is causing it to pull the throttle slightly at all times. It is also possible that the engine is running rich and revving higher to compensate for the extra fuel. I would recommend having an inspection performed by a professional to pinpoint the cause of the abnormal acceleration.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: What lights are present on the instrument panel?

The vehicle is equipped with a number lights on the instrument panel, located in the dashboard behind the steering wheel. These relate information to the driver. Standard things like speed and fuel level are simple enough, but there are a...

Q: Car won't start, fuel gauge and speedometer malfunctioning

Hello there, the first place I would look, with all of the symptoms you've described, is into the no start condition. The most likely cause of a no start would be a problem with the battery, starter, ignition switch, fuel...

Q: Temperature gauge starts cool as usual then rises almost to max where I have to pull over and let cool down

Hi there. Several things could be going on here. The fans may not be working properly, there could be a coolant leak causing low coolant levels, or the temperature sensor for the gauge is inaccurate. Many of the GM 2.8,...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...