Question about 1991 GMC S-15 Jimmy

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REAL HOT EXHAUST

I HAVE A 1991 GMC JIMMY 4.3 ENGINE. HAVING RUNNING PROBLEMS. THE EXHAUST THATS COMING OUT OF EXHAUST IS SO HOT CAN NOT HOLD HAND IN FRONT OF.

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  • yadayada
    yadayada May 11, 2010

    that is normal. what trouble codes do u have?

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Sounds like the catilitic converter is plugged.

Posted on Jan 09, 2009

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A very common failure on these is the CPFI unit , or SPIDER as people like to call it.

There is one single injector which feeds each cylinder via a pipe and poppet. The injector becomes blocked and the engine won't start or run.

Before you go condemning this though, just make sure you have good fuel pressure because the fuel pressure regulator or fuel pump could also have a hand in the problem. Make sure the pump is running, and if not then check the fuse, the relay, and the pump itself.

Very best regards

Geordie

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