Skip the auto shop - Our mechanics make house calls

Q: Idle speed too high.

asked by on

Once the engine warms up, the engine speed some times goes to 1200 to 1500 RPM at idle. Tapping the accelerator will some times bring it back to 800 RPM. Thought the AC might have been the problem, But, I'm now convinced that may not be the problem.

My car has 133000 miles.
My car has a manual transmission.

A: Hi, thank for your question. If the AC is c...

Hi, thank for your question. If the AC is coming on but the compressor is not engaging, then it could cause a higher idle than normal. The throttle position sensor and idle control valve need to be tested with a scanner to see if the TPS is set correctly and the idle control valve is sticking open from carbon deposits. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect this idling issue for you, and make or suggest any repairs as needed.

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 not always starting and going slow when it does.

It appears that there are problems with this vehicle's fuel filter. It is possible that the fuel filter is stopped up or the fuel pump is bad. I would recommend a mechanic, such as one from YourMechanic, to come out...

Q: Cannot turn off car alarm.

There are a lot of problems with Ford's anti-theft device in that year model. You should be able to reset the anti-theft alarm by locking and unlocking the passenger side door with the key. If that does not work I...

Q: What does it mean if the Low Fuel Light is displayed on the dash?

While your gas gauge tells you how much fuel is left in the tank, it can sometimes be easy to miss it. The Low Fuel Warning Light in the dash of your car comes on when you have very little...

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...
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...
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.