3.4 and what I think is a misfire... - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 07-26-2007, 10:34 PM   #21
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Have you gotten the plug wire rerouted so it doesn't short out on the o2 sensor wiring?
If not get that done and you will most likely see a change, although if it should be shorting at all times it is in contact with the car running.
Also, you might want to test the plug wires..... I had a 3 month old set go bad on my old 95 Bonneville SLE SC. Had a big misfire and was going to the track. I was away from home for the week so I didn't have my ohm meter or any tools so on a hunch I stopped at NAPA, pulled the plug wires off went in, and they just asked what yr, make, model, engine and gave me a new set. Went back out and put them on the car and immediately I saw increase in throttle response, and no more misfire.
I also suggest you ask if you can exchange for the thicker (8mm Series I vs 7.5mm Series II) plug wires. The SI rears won't have nearly as much slack as the SII'*, but will still fit without being overly short.
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Old 07-26-2007, 11:06 PM   #22
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Misfire is cured. It is not an issue anymore. Just wondering about my KR situation.
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