Question about 1989 Chevrolet Corvette

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89 corvette quit running found bad ecm and replaced then the comp was bad replaced so now car idles great but will not take gas runs rough and misses real bad

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Check the fuel injectors - seems the new fuel is messing these up...

Posted on Aug 17, 2010

  • dalef760 Nov 08, 2010

    last resort check pins on plug to ecm

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89 corvette idles rough when warmed up


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1990 corvette idles rough sometimes. Sometimes it runs great when I start it up. then other times it wants to stall and I have to give it gas for a while but it still idles rough. It's either one way or...


Sounds like a clogged fuel injector.
Or worse one starting to go bad.
The problem with your car is the computer system readout is analog.
older models have a OBD-1 system and it makes finding the location of a bad injector a lot harder to find.
You could try a after market fuel additive called "sea-foam"
Most Wall-marts carry this product.
Give it a shot,I've done so myself on a VW VR-6 and talk about finicky fuel injectors!.
Worked really well for me,hope it does the same for you.
If I helped any please give me a vote.
Thanks,Gary

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on top or near the thermostat housing is a sensor it tells the ECM what to do corvettes run hotter than average cars 210 f i believe, i wish i could chek it hands on in '' REAL TIME" FIND A MECHANIC WITH A SNAP ON SOLIS, DONT SPEND ANY MORE $ ON IT UNTIL IT IS MONITORED IN REAL TIME

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