Question about 1993 Geo Prizm
Upon startup it idles 2600 2700 and instead idleing down when it warms up. it jumps to 3200 3300
Lots of folks (me too) would love to have your car.
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alldata dot com.
idle out of control
this is a carb car?
well there are 2 reason on that setup.
1: ignition timing way off.
2: carb bad. (top reason, chock on stuck and fast idle cam stuck there)
id get a Factory FSM on this car , really.
Posted on Oct 05, 2013
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Posted on Jan 02, 2017
Sounds like your idle air control, or IAC valve. Take it off and clean it out with some brake cleaner. Carbon deposits and gunk can build up and prevent the IAC valve from operating properly, by causing it to stick. If cleaning it doesn't work, you may have to just replace it. It happened to me on my Sentra, tripping my check engine light, sputtering hard, idled crazy, no power, etc. But once I cleaned it off, it ran so smooth. You'll need to get a replacement gasket, though, or make your own out of gasket paper.
Posted on Feb 04, 2010
SOURCE: 1990 tracker idles high all
check for vacuum leaks. this can be done by waving a gas torch (propane) near the intake piping between the throttle body and the intake manifold with the engine running.
Posted on Oct 06, 2010
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