1991 Geo Storm poor milage, black smoke from tail pipe, idl

1991 GEO STORM
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LARRY WELLS
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Engine Performance problem
1991 Geo Storm Two Wheel Drive Automatic 35,891 miles

I am a technician and i am baffeld ! the car came to me with [crank no start] i found a bad ign. module. this fixed that problem. now it runs rich, black smoke at idle, no check engine light, i checked o2 sensor, iac, and did a full tune up. i also fixed an exaust leak at the manifold gaskits.and still no change! i see there are others with same type of problems with this vehicle, [any help out there?]
Oct 7, 2009 at 1:44 PM
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LARRY WELLS
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I found the problem ! I tested the injector restestance and found 3 of the 4 were out of spec. [0.16 olms] replaced them, and it now runs good ! thanks any way. Larry Wells,
Oct 17, 2009 at 10:55 PM