Thread: 2005 Grand Prix 3.8L suddenly doesn't want to run then shoots a P0300

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  1. #1 Re: 2005 Grand Prix 3.8L suddenly doesn't want to run then shoots a P0300 
    SE Level Member 08 gp lvr's Avatar
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    I am having this exact same issue. Number 2&5 coil not firing. I replaced it with a new coil and still didnot fix the issue. I changed my plugs 6 months ago with iridiums. Any insight would b appreciatd. I'm stuck without a car.
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  2. #2 Re: 2005 Grand Prix 3.8L suddenly doesn't want to run then shoots a P0300 
    Killa Bee Scottydoggs's Avatar
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    Quote Originally Posted by 08 gp lvr View Post
    I am having this exact same issue. Number 2&5 coil not firing. I replaced it with a new coil and still didnot fix the issue. I changed my plugs 6 months ago with iridiums. Any insight would b appreciatd. I'm stuck without a car.

    does it fire, ( the coil?) or does it misfire? maybe you got the plug wires on wrong.


    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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