Question about 2000 Saturn SL
You could try replacing the idle air control valve but I would obtain one from a local salvage yard, its cheaper and you are not certain if thats the problem, another thing i would check is your intake manifold gasket where it meets the cylinder head, if tha gasket is cracked or leaking it will allow excess air to enter the engine and make it idle higher, the easiest way to verify this is get a can of carb and choke cleaner and spray it all around the intake gasket area, if the engines idling characteristics change drastically then the gasket is bad and needs to be replaced if theres no change in the idle I would start looking for vacumm leaks and the idle control valve issue, which you specified.
Posted on Feb 14, 2011
Had same problem 2 years ago change idle air control clean throttle body , erg valve .It only would idle high when i left it out in the cold all night. When i leave in my garage it would not idle high. With help from a Saturn mechanic found intake manifold gasket was blown and giving me all kinds of false codes.Now its been 2 years i having the same problem again seeing this again makes me think i having the same problem again it emission time again
Posted on Dec 30, 2012
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Posted on Jan 02, 2017
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