Skip the auto shop - Our mechanics make house calls

Q: High idling on cold start

asked by on

My car has been idling very high. It happens when the engine is cold and during bad weather. It would start revving in the 1900-2100 RMP range and it would go on like that until I let it warm up for several minutes. Then I would put it in gear and press the brake pedal hard in order to decrease RPMs. I went to the dealership and they had the computer reprogramed, which helped a bit. However, the problem hasn't been solved. What should I do?

A: Hi there thanks for writing in about your 2...

Hi there thanks for writing in about your 2006 Lincoln Zephyr. This sounds like a failing idle air control valve issue. If this is confirmed, and the valve is replaced, there is also a 'relearning" process for the engine management computer (ECM) which should be followed so the ECM can calibrate itself to the new valve. If you need help having this looked at, a certified professional from YourMechanic can inspect the high idle and let you know how to best proceed.

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・Save up to 30%

Get a quote

What others are asking

Q: Takes 3-7 tries before engine stays running

Hello. The symptoms you are experiencing, hard starting and an unstable idle speed, can be caused by a variety of issues. You mention that you replaced a few parts, namely ignition components, so they should be alright. The next things...

Q: Air suspension compressor is coming on but it is quieter than normal and is not lifting navigator

Hello there, you have a few different potential issues going on with your 1998 Lincoln Navigator air compressor. If the air compressor sounds weak, there is likely an air leak, or the compressor is failing. Air leaks can be found...

Q: Corrosion and battery acid on negative terminal connector.

Hi there. Poor electrical grounds can create unusual electrical problems. The corrosion at the negative battery terminal is most likely, the result of a leaking battery and should be replaced. Not all code readers are German car friendly. I recommend...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
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.