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2001 Grand Prix GTP Misfire problem...
Well my friends 2001 gtp has a little problem it's a grand prix with the l67 engine (3.8 supercharged). Well all of a sudden it started to run like shit...and i mean like shit..put in a gear and runs horrible. So I run to the autoparts store and rent a computer tester. Ran the test, no.6 misfire it said (I can't remember the exact code number). So we start running through the no.6 cylinder. Pull the plug..plug it into my roomates mazda 323, nice beautiful spark. Ok next is the wire, pull it off, has continuity and the right amount of resistance. Switch coilpacks, still not it. I started to search on some forums, seems like lots of people have a cracked head problem...anyone else heard of this or have any ideas?
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