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.

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

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: Q: Car only drives in Reverse

With the symptoms you have described, the most likely cause is a leak in the transmission. When the fluid level changes drastically, the transmission loses the ability to pump fluid and transfer power. A qualified technician, such as one from...

Q: Replace a power steering pump and the fluid boiling out the pump and still leaks.

Hi There, It is very uncommon for power steering fluid to boil. It may be more likely that the fluid may have air bubbles in it as a result of changing the power steering pump. Air bubbles in the system...

Q: Car cut off on the highway and never started back up.

Hello there, many faults will cause your 2004 Chevrolet Impala to die while running and not restart. The P0443 code is for the Evaporative Emission Control System Purge Control Valve Circuit and though this will need to be addressed will...

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...
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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...