TOP COIL OF THREE HAS NO SPARK

  • Tiny
  • Dport
  • 1999 Pontiac Bonneville
  • 235,000 miles

A couple of months ago I changed the coil out and it seemed to be working for a say or so. I also changed the plugs at the same time. I tried to change the coil out today and the results were still no spark to the top coil, the bottom two do have spark. I made sure all plug wires and coil wire and connections were clean and snugly in place, still no spark to the top coil.

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Thursday, August 30th, 2012 AT 11:42 PM

5 Replies

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

Module most likely has failed. Have it checked to confirm. You can remove it and have a parts store check it for you.

Roy

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Friday, August 31st, 2012 AT 12:09 AM
  • Tiny
  • Dport
  • Member

Are you saying the coil has failed then.

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Friday, August 31st, 2012 AT 12:11 AM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

No, I said the module. That is the piece under the coil that it bolts to.

Roy

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Friday, August 31st, 2012 AT 12:15 AM
  • Tiny
  • Dport
  • Member

Thank you Roy, I will have it tested then.

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Friday, August 31st, 2012 AT 12:31 AM
  • Tiny
  • Dport
  • Member

Roy, Thank you that was the problem!

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Friday, August 31st, 2012 AT 2:17 AM

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