2004 gxp misfires - Page 5 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 12-18-2011, 02:06 AM   #41
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Quote:
Originally Posted by rallton View Post
.will let you know if the plug corrects this in the morning.
did any hear the conclusion to this drama? Did it turn out to be a coil, plug, injector, vacuum leak or ??
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Old 12-18-2011, 02:27 AM   #42
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yeah, ordered a coild pack from Rockauto to replace the front 4 coils. I used one of the four to replace the bad one in the back and the misfire stopped.....
Still have crap gas milage but until I replace the exhaust, thank you GM for an all or nothing exhaust... I'll continue to have the low gas milage....
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