Question about 2002 Chevrolet Express

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PO304 Misfire - 2002 Chevrolet Express

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  • Anonymous Dec 24, 2008

    Oh ****. Mine's doing the same thing. 70-75 mph. check engine light flashes. loss of power. misfire code. mechanic says it just needs a tune-up. I might be in trouble.

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Since I bought my van in 2002 the check engine light has come on whenever the engine is under load and I hit 70-75 mph. the stored codes were always a random misfire. The dealer threw everything at it, replaced the fuel injection system twice, the rotor and cap three times, plugs, wires, all kinds of sensors. I would NOT give up and kept bringing it back. They FINALLY fixed it when they discovered that there was "not enough clearance at the head for the valves" (?). The heads were removed, machined and some internal parts were replaced. Finally, I can go up a hill, hit passing gear and the light doesn't come on!

Posted on Sep 15, 2008

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______________
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