motor missing badly
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12 Second Club
Joined: Apr 2007
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motor missing badly cold start this morning ran fine , drove about half a mile .
it started missing bad ,turned it around and got it home .
got home from work ,changed all the plugs (ngk tr55)
and swaped in a diff set of wires (napa wires)
motor is still missing bad , but only on the odd numbered cilinders.
it started missing bad ,turned it around and got it home .
got home from work ,changed all the plugs (ngk tr55)
and swaped in a diff set of wires (napa wires)
motor is still missing bad , but only on the odd numbered cilinders.
Check the ground on the back side of the driver head. It will be loose bet ya money. There has been numerous problems with them at our dealership. If it is not loose clean and tighten the hell out of it.
Thread Starter
12 Second Club
Joined: Apr 2007
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checked all the conections did a visual of the harness, and re did both of the grounds on the cilinder heads. motor is running better but is not fixed yet .
# 7 cil is still miss firing badly and a few others also but not as bad as #7
and it doesnt do it all the time ,but when it does happen it is a constant miss.
it will clear with a rev of the motor but then comes back.
also the motor is on solid mounts ,it does not move ,and has been on these mounts for a year .
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# 7 cil is still miss firing badly and a few others also but not as bad as #7
and it doesnt do it all the time ,but when it does happen it is a constant miss.
it will clear with a rev of the motor but then comes back.
also the motor is on solid mounts ,it does not move ,and has been on these mounts for a year .
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Thread Starter
12 Second Club
Joined: Apr 2007
Posts: 171
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could it have just been bad gas? i re tightened both ground straps,still had a misfire.
took it out filled up with gas had a few light misses.now all are gone .
i have watched for misfires with the predator on 4-40 mile trips .
took it out filled up with gas had a few light misses.now all are gone .
i have watched for misfires with the predator on 4-40 mile trips .
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I had a misfiring problem similar to what yours sounds like. My crankshaft sensor wire was grounding out on the header, causing misfiring, sometimes bad enough to kill the car. I insulated the wire and have had no problems since.
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