Question about 2002 Pontiac Grand Prix

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2002 grand prix 3.1 code says number 6 cylinder misfire detetected. I changed the coil pack spark plug and wire and alSo changed the board tat the coil sets on. Computer stillsays #6 misfire detected. The injecter is clicking .what could be the problem?

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It's a possibility the injector is the problem. It may not have the psi it needs, therefore the cylinder could be misfiring, or the injector could be letting too much fuel in. Before I change the injector, I would try to have someone to clean the injection system to see how it works. The cleaning around in South Carolina is $99-$149 depending on where you go.

Posted on Jul 04, 2010

  • Chris Busby
    Chris Busby Jul 04, 2010

    One other note I want to mention is, with the injector clicking, it's an indication the injector is bad. The clicking from the injector it just kinda like a solenoid trying to open the injector. The solenoid is trying to open but it can't to let the injector spray fuel to the cylinder.

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