Skip the auto shop - Our mechanics make house calls

Q: What causes the RPM's to jump so high on my 2005 Chevy Impala LS with a 3.8 liter engine

asked by on

The RPMs on my 2005 Chevy Impala LS with a 3.8 liter engine they are jumping real too high and it's idling too high what could be the problem

My car has 141000 miles.
My car has an automatic transmission.

A: If you are having high idle conditions, the...

If you are having high idle conditions, then you may be having a couple different problems. The first is the idle air control valve may be stuck open allowing too much air past the throttle body. The valve can be tested and diagnosed with a computer scanner. The next thing could be a vacuum leak in the intake manifold gasket or behind the throttle body. A vacuum leak check would find this problem. The last problem may be a throttle body stuck open causing the problem. This can also be tested by scanning the computer and diagnosing the problem through a pinpoint test. Contact a qualified mechanic to come to you and test and diagnose your high engine idle.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Van jumps forward on the drive gear

Hello and thank you for your question. For the issue of the transmission jumping forward and making a thumping sound, there could be a few different things that cause the situation and sound. First check the condition of the brakes...

Q: Why do my interior lights dim when stopping and car intermittently shuts off at stop light. 2006 Chevrolet Trailblazer

Hello. This can be caused by a number of things. Most of the time if this only occurs when coming to a stop it is because the computer is not maintaining a high enough idle. This can occur because of...

Q: Car starts and then dies

The details you provided about your Impala suggest there may be a problem with your car’s charging system. What is likely happening is that your alternator is failing intermittently after it starts. This means that the alternator is sometimes charging...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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.