Q: Q: Iac

asked by on

My car keeps reving up real high by itself, changed tps, map sensor, iac valve, and no leaks. I changed the iac twice and still having same problem, the valve keeps staying in the hole and not coming out, that’s why engine revs. Cleaned the hole and everything. 2 new iac. If I unplug the iac it doesn’t do it. Can you please help.

This can be caused by the main engine computer has the IAC shorted full open or there is a short in the wiring to the IAC that holds it open. If you do not get any codes or do get IAC fault then you may need to replace the PCM.

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

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: Jeep idling rough.

The rough running engine may indicate a miss fire in one or more of the cylinders or the crankshaft sensor may be intermittently not registering. The most common problem is fouled spark plugs and would require plug replacement to fix...

Q: New radiator

You should have a pre purchase inspection by a mechanic like one from YourMechanic to do a thorough inspection of the vehicle so you know the vehicles shape. The inspection may catch a problem that can cost thousands. It can...

Q: power steering whinning. And wants to jerk back straight when I turn.

Hi Kenneth. Thanks for contacting us today. Typically these symptoms are often an indication of low power steering fluid or a lack of fluid pressure. If the vehicle is pulling in one direction, it's possible the rack has been damaged...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...