Skip the auto shop - Our mechanics make house calls

Q: When the clutch is engaged or in neutral it stays revved up at 2000 RPMs and won't go back to idle RPMs

asked by on

when clutch is ingaged or in nuetrual it stays reved up at 2000 rpms and wont go back to idle rpms. the only way to get it to go down a little is to put in neutral and rev it up a little
My car has a manual transmission.

The causes of high idle speed can be determined via a diagnostic. Engine idle speed is controlled via an idle air control valve (IACV). If the valve is malfunctioning, or even if the fuse to this electronically controlled valve is faulty, the IAC motor could malfunction, leading to a higher than normal engine idle speed. Vacuum leaks can also cause a high engine idle. The engine’s oxygen sensor will detect the extra oxygen entering the engine through the vacuum leak which will alert the engine’s computer that the exhaust is running lean, which will prompt the computer to pump in additional fuel, resulting in an abnormally high idle. A malfunctioning throttle system can cause both a high idle as well as an engine stall. A dirty air intake or cracked air intake tube is often the culprit. Although "rare," if the car’s PCM (main engine control computer) malfunctions, that can cause a high engine idle, but all other potential causes, of which there are quite a few would have to be ruled out first. YourMechanic can diagnose your abnormally high engine idle during a mobile visit to your home or workplace.

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!
  • Home
  • Questions
  • When the clutch is engaged or in neutral it stays revved up at 2000 RPMs and won't go back to idle RPMs

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: Multiple replacements required due to popping clutch

Hey there, thanks for writing in about your 1992 Toyota Paseo. It sounds like there is some underlying electrical issue that is occurring. A loose or corroded connection can be causing problems in the ignition circuit. I would recommend having...

Q: bearing shaft and balance shaft

Hi there. The recommendations to replace these parts may be a sales ploy to make some money from you since the dealer has to do this piston work under warranty for you. If you have an engine issue after they...

Q: Replaced ignition lock cylinder in my Mazda 3. How do I reprogram it to start the car?

Hi there. Put the key into the ignition and turn it on. Then press the lock button on the key fob and turn off the ignition. Then turn on the ignition and press the unlock button on the key fob...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.