Geo Prizm
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Ford Escort ZX2

How do you adjust the idle on a 1991 Geo Prizm?

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Wiki User
2009-01-16 19:29:44

These is a little metric set screw on the semicircular cam at

the end of the throttle cable. It has a locknut that will need to

be loosened for the adjustment. -On my geo, there is a flat-head

screw on the intake manifold, right next to where the hose is

connected from the airbox. Simply turn it right or left to adjust

your idle. Hope that helps-


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