Q: Car idles high at startup

asked by on

My car idles high when I start it.

The idle air control valve on your car may be defective, causing the high idle. A couple of checks would need to be done to determine if this is the case. Your engine needs to be checked for any vacuum leaks, and then the idle air control valve should be checked for carbon sticking valve, and throttle body open. If all of these are okay, then the valve should be checked to be within specifications, electrically. I recommend a mechanic, such as one from YourMechanic, run a detailed inspection of your vehicle’s high idle speed.

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 idles high at startup

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: Can you remove fuel pump from inside car? 1993 Lexus LS400

Hi there - yes, you can removed the fuel pump from inside the trunk actually. There is an access plate under the trunk liner for this purpose, allowing access to the fuel tank (and pump) without dropping the tank. Remember...

Q: Advice on buying a '93 Lexus SE with a 2JZ engine with a blown head gasket

If they did blow the head gasket, there is no saying what they did to the engine. You can of course, take it apart. It's a nice engine. It's a straight six -- not a V6. So you only have...

Q: Q: Idle fluctuates and then stalls.

Hi There! It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate and eventually stall. The idle air control valve is a small valve on the engine's intake system that...

Related articles

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...
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...
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...