Think you’ve got a bad IAC?

Don’t let testing myths fool you – get the real facts, right here.

The Idle air control (IAC) valve diverts air around the throttle blade to control idle speed. Seems simple ...

Why selecting the correct IAC for your vehicle is critical  

Sure, it can be tempting to substitute the wrong IAC into your car to save money. But, in most cases, the swap won’t work properly and you’l...

Contrary to popular belief, diagnostic trouble codes (DTCs) are not an actual diagnosis. They’re only clues, which serve as a startin...

What should you do when yours goes bad?Parts for older BMW vehicles are getting harder and hard...

So, you have received your new idle air control valve, you’ve installed it, you were looking forward to a new driving experience, and now this:
The idle speed is fluctuating, and is either too high or...

The idle air control valve (IAC) -- also known as the idle speed controler (ISC) or actuator or stepper motor -- regulates the idle speed of your engine. Sometimes parts go bad, which results in your ...

Do you need help changing the Idle Air Control valve in your car?