idler control unit
It is very possible that the throttle plate is dirty and causing the throttle to hang up.
i have a 90 lumina 3.1 i was told you cant adjust the idle, but i fyoure hvaing idle problems like i was try replacing the idle air control motor. Try cleaning it and the throttle plate. Go to bgfindashop.com and find a local repair shop that uses BG Products. The air induction cleaning will normally take care of those problems.
Lumina in USA does not have a carburetor
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The idle is not adjustable, it is computer controlled, which means the idle is not the problem. Look for a check engine light.
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Is this a 3.1 liter engine? tipicaly by the throttle body area. idle sensor or idle air controll valve?
yes
123456
NO.