Extremely high idle

JGRANADO1

MEMBER
1990 TOYOTA CAMRY
2.5L
V6
2WD
AUTOMATIC
120 MILES

My car was running smooth and great, until it started to have a idle surge. Then the idle increased higher and higher. Now it idles at 2500 to 3000 rpm's in park, and around 1300 to 1500 in drive. I checked for vacuum leaks, found nothing. Replaced PCV valve, valve cover gaskets, intake gasket, cleaned throttle body, nothing helped. On a test drive, I had to hold the brake going through a school zone, because it will run at 35 mph, with my foot off the gas. Car is not driveable like that. How do I fix this?

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,536 POSTS

Hello,

This car has a idle air control valve that sticks because of carbon build up (not the throttle body). Here is a guide the help you clean the valve which is bolted to the throttle body and must be separated:

https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken

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Thursday, October 18th, 2018 AT 6:58 PM

JGRANADO1

MEMBER
2 POSTS

Thank you for the information. That is a good guide to replacing an idle valve! I did not mention that I already removed and cleaned the idle valve, as well as the throttle body. Did not help. I ordered a new used idle valve, to try next.

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Thursday, October 18th, 2018 AT 7:13 PM

KEN L