Engine idle speed too high? Get your car inspected at your home or office.

Our certified mechanics come to you · Backed by our 12-month, 12,000-mile warranty · Get a fair and transparent estimate upfront

GET A QUOTE Backed by 12-month, 12,000-mile guarantee

Engine idle speed is high Inspection Service

The engine idle is in many ways the pulse of your car and if it is running high, it could indicate a serious issue with the vehicle. A high idle can be caused from a number of issues, ranging from a faulty fuse to something a bit more complicated like a leaking vacuum hose.

How this system works:

The technical definition of idle speed is the rotational speed an engine runs on when it is uncoupled from the drivetrain and the throttle is not being depressed. It is measured in revolutions per minute (rpm). A passenger car will typically have an idle speed between 600-1000 rpm.

The idle control valve, also called an idle air control motor controls and maintains the engine idle speed.

If a number of vehicle accessories are running, for example, air conditioning, this will push up the idle speed, as the engine needs to generate enough power to run these accessories.

Common reasons for this to happen:

  • Faulty Fuse: In the majority of vehicles, engine idle speed is controlled via an idle control valve (ICV). A faulty or blown fuse in other electronically controlled systems can cause the IAC motor to malfunction, leading to a higher than normal engine idle speed.

  • Faulty Idle Control Valve (ICV): The job of the idle control valve is to maintain and control a consistent idle speed. The ICV will help counter any extra loads put on the engine such as lights, stereo and air conditioning. This part will often malfunction due to excessive carbon buildup in the intake manifold.

  • Vacuum Leak: On a fuel injected engine a vacuum leak will cause a high engine idle. The engines oxygen sensor will detect the extra oxygen entering the engine via 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.

  • Malfunctioning Throttle: 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.

  • Computer Malfunction: A computer malfunction can cause a high engine idle, especially the powertrain control computer. If it misinterprets the information it is receiving about the current idle speed, a high idle speed may be the result.

What to expect:

A top-­rated mobile mechanic will come to your home or office to determine the source and cause of the high engine idle speed issue, ​and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How important is this service?

In most cases a high engine idle is something that should be looked at as soon as possible. If the weather is cold, see if the issue corrects itself as the engine warms up, if not a professional should look at the vehicle.

Fast and easy Engine idle speed is high Inspection service at your home or office.

Backed by 12-month, 12,000-mile guarantee

People say the nicest things

Kevin showed up ready to do his job and did just that. He showed me a couple important things on my vehicle I had overlooked and was nothing less than incredibly professional, knowledgeable, and informative. I would, without hesitation recommend him to anyone I know and would gladly use him again.

I have to be honest, this was the first time that, I have EVER felt 'at-ease' around an auto mechanic. Jonas was thorough and straight forward with me about the issues; gave me a quote directly after doing the diagnostics on the car and, as it turned out, it cost me less than the original estimate. When does that ever happen with auto repairs ?? He was friendly, informative and knowledgeable. You folks made the whole experience convenient and painless. I'm "sold" on the "Your Mechanic" concept. I'll probably never take my car again to a traditional mechanic !! Jonas was a pleasure to deal with !

Tom went above and beyond to make me as satisfied as I could be. His communication was excellent. Friendly and professional and best if all, my car is running great and he did it without unnecessary repairs. I would and will highly recommend Tom and Your Mechanic to everyone. Thanks, Rob Miller.

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com