Question about 1991 Chevrolet Cavalier

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My 1991 cavalier z-24 when it warms up it drops it revs and misses what would cause this

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Sounds like a vacuum leak...by using WD-40 spraying along the vacuum hoses, when it finds the leak the engine will rev up, there is your leak.

Posted on Sep 13, 2010

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Missing and not starting when gets warm and run for a bit


ok.. for starters you need to check why you are loosing revs.. it could be your powersteering switch on your steering rack not working.. just bridge switch to test.. revs should not drop on steering.. then check fuel pump relay.. and efi relay.. theese cars are gettin on.. so could be faulty with long use..heat related.. insert a visual inline fuel filter and when it stalls check fuel flow... aswell as put a little fuel in the vacum hose line and see if it starts to confirm its a fuel issue... if the visualis fuel flow than its fuel pump related.. wires can come loose of pump .. as they travell under rear seat.. and into tank.. ... good luck

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