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

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: hai this is lila i have problem in my brake system could you help me

Hello, thank you for writing in. When you have the entire wheel monitoring system experiencing an issue, there is either a problem with the body control module or a sensor shared by the system. Typically the first place you want...

Q: I changed the fuel pump and truck ran great for 3 days. Now after 3 days, the truck dies. It will start running for a few minutes, then dies like before.

Hi there, thanks for writing in. I'd be happy to help. It sounds like you should disconnect the connector to the fuel pump and inspect it for any signs of getting hot. The female connections may be too loose on...

Q: Ignition switch wont turn

The key must pass the vehicles security in order for the vehicle to start. The ignition lock cylinder housing contains the electronic equipment necessary for the vehicle to start. The keys and ignition lock cylinder replacement are a purely mechanical...

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...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.