2001 Saturn SC2 idling too high

JIMUDELL76

MEMBER
2001 SATURN SC2
4 CYL
FWD
MANUAL
83,000 MILES

When I start my car it jumps up to 3000 rpms, after a few seconds it drops to about 2600, should be around 600-800. I took the throttle body off cleaned it, took the IAC off cleaned it and tested it and moves slightly, from what I am told thats all it is supposed to move. I also sprayed carb cleaner around vacuum lines, manifold and everywhere else I could think of to check for leaks. I am out of ideas. If you have any it would be a big help. Thanks, Jim

3 Replies

SATURNTECH9

MECHANIC
30,869 POSTS

Do u have any codes?Also u could have the iac motor frozen in place causing the high idle let me know what u find.
Louie

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Sunday, October 25th, 2009 AT 1:23 PM

JIMUDELL76

MEMBER
2 POSTS

The codes I ended up with were P0301, P0404, and P0507, the iac motor does not seem to be stuck, if you have any ideas let me know. Thx alot. JIM

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Monday, November 9th, 2009 AT 2:54 PM

SATURNTECH9

MECHANIC
30,869 POSTS

Ur code p0301 is cyl 1 missifire woulded cause a high idle code p0404 I belive is a egr code remove ur egr valve check to see if it's leaking clean with some carb spray while u have it off. Code p0507 is high idle u know u have that problem. Most of the time I have seen that high of idle on those Cars has been a vaccuum leak or a stuck iac when it's idling high try tapping lightly where the iac motor is if it idles down then u have a bad iac motor use a little hammer and don't go crazy. Also u might have a bad coolant sensor that could cause a high idle but usually not that high but they are under 10 at the auto parts store if u replace only use a brass tip one not a plastic tip one. Let me know what u find.
Louie

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Monday, November 9th, 2009 AT 10:27 PM