Skip the auto shop - Our mechanics make house calls

Q: High idle

asked by on

Description of Problem: I have a 2000 Saturn SL2 with 100,000 miles and a transmission with 90,000 miles that got replaced 6 months ago. The idle for the car is about 1200 rpm and it likes to buck and stay in a high gear.

The most common cause for this is a vacuum leak somewhere. Lift the hood and listen for a hissing sound coming from the engine. You can also use an aerosol spray, like brake cleaner, or WD40, to lightly spray a small area at a time, in very short bursts, and listen for the idle speed to change. Just be aware that these sprays can be extremely flammable and can cause a fire if sprayed into places that can cause it to ignite. If you need help having this taken care of a qualified professional from YourMechanic can come to your car’s location to diagnose the high idle and assist with proper adjustments.

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: Car jerks at over 60 mph while shifting from third to fourth gear

Hello. Most of the time, when this vehicle starts doing this in higher gears it is because the transmission is failing internally. The clutch packs begin to fail and slip and this occurs. It can also be a pressure issue...

Q: Won't start

Hi there, thanks for writing in. An engine that will not start can mean there is no fuel pressure, no spark, bad spark plugs, or something else. If you have no fuel pressure, then you may have a fuel pump...

Q: Car not starting after performance chip install

Hi, your car may be in anti-theft mode. The system may not recognize your key. The ani-theft mode and wiring may also be defective. In order to have this issue properly diagnosed, I would have a technician come and inspect your...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.