Skip the auto shop - Our mechanics make house calls

Q: Idle speed too high

asked by on

The car's idle speed is about 2100 RPM, almost 2.5 times the set speed. The engine is a supercharged 3.8 V6.

A: The idle speed may be elevated due a a larg...

The idle speed may be elevated due a a large vacuum leak. When unmetered air has entered the engine, the vehicle may try to compensate by adding fuel. The extra air and fuel translate to an increased idle speed. Have a certified mechanic, such as one from YourMechanic, diagnose your high idle speed and provide possible 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

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: white smoke coming from exhaust

White smoke on start up is typically due to steam clouds, that is condensation in the engine and exhaust vaporizing. Only if the white smoke doesn't go away as the engine warms up and/or if this white smoke in the...

Q: Code C342D

Hi there. Either the throttle position sensor (TPS) or the idle air control valve (IAC) is not working. Check the wiring to the TPS sensor and the IAC valve and see if they are plugged in and if there is...

Q: Car won't go into reverse.

The manual transmission on these vehicles had a bad reverse gear design and was very prone to failure after getting worn. The transmission reverse gears do not engage enough in these transmissions and after the gear wears will not engage...

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