Q: Car revs up and won't rev down. Changed ICV

asked by on

Car won,t rev down changed idle control valve
My car's transmission is unknown to me.

High idle problems are often times related to vacuum leaks or lean fuel conditions. I would start by checking for vacuum leaks and other fuel delivery components, such as the mass air flow sensor, injectors, throttle body, etc. High idle problems can also be caused by faulty or damaged spark plugs. Try checking and/or changing spark plugs as well. You may also want to run a fuel injection cleaner through a tank of fuel as sometimes something as simple as a dirty injector can cause a high idle or surging idle problem. If you would like to have this taken care of, a certified professional from YourMechanic can come to your car’s location to diagnose the high revving issue and assist with a proper repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car revs up and won't rev down. Changed ICV

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: Shaking at the front end of the car

Saturn became aware of a vibration like you are describing on many of their vehicles and designed a fix for it more than 10 years ago. The fix is described in Technical Service Bulletin (TSB) 00-T-57A. It calls for installing...

Q: Q: Steering wheel locked.

The loud noise may be due to the fluid has leaked out of the power steering pump. This would make the steering very hard to turn without any power assist. The system has a major leak if it lost all...

Q: I have a Shogun 3.2 did. The mut scanner from a friend reveals a fault code 35 and says the engine rpm at 3000 and 330 n/m.

Hi there. The fault code 35 reveals that the O2 sensor bank one (upstream sensor) has picked up an issue with the emission quality of the exhaust. This means that the engine could be lean or rich in fuel mixture....

Related articles

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...
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.