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2000 Pontiac Grand Am Skip on 1 and 4 cyclinder

Tiny
JOSHSAUTO
  • MEMBER
  • 2000 PONTIAC GRAND AM
Shakes or Wobbles problem
2000 Pontiac Grand Am 4 cyl Two Wheel Drive Automatic 151K miles

I am not getting any spark from plug 1 and 4. I put new coil in, also switched with the one that works. Tryed plugs, tryed control mod, did a oms set on the cover that the coils sit in. Changed CKPS, TPS. I have gone over the wiring and still skipping. I put my scan tool on and the computer says everything is good. No codes and not skipping. I have not changed the Cam sensor. I, m leaning towards a PCM. What your thoughts?
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Monday, May 31st, 2010 AT 8:32 AM

2 Replies

Tiny
GM-TECH
  • MEMBER
  • 11 POSTS
Spometimes an OHM test of the coil housing is not a difinative test. It could tet good, but stillcasue a no spark condition.
This would not be a PCM problem. Pcm does not control spark to individual cyliunders.
If not the cover, then check for poor ground wire connections at the trans - engine bellhosuing. From the front of the car, look down between the engine/trans. And the radiator. There are a few ground that can be attached, but will break if you tug on them a little bit. This can cause problems on 1-4, or 3-4. Lso look closely at the spark plug wire boots.
Again, suspect that cover, even though it OHMs out OK.
Www. JustAutoRepair. Com
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Monday, May 31st, 2010 AT 1:24 PM
Tiny
JOSHSAUTO
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  • 2 POSTS
It turned out being the cover. All the spark times where going to the 2 3 cyclinders. Which ended up melting the spark plugs. New cover and plugs and it off and running. Thanks for the info!
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Wednesday, June 2nd, 2010 AT 8:39 PM

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