MY 1999 CHEVY BLAZER WITH THE 4

  • Tiny
  • Chriscampbell96
  • 1999 Chevrolet Blazer
  • 153,000 miles

My 1999 chevy blazer with the 4.3l vortec v6 has cylinder 4 misfire. I have replaced the plugs, wires, rotor, and cap multiple times. The coil wire is arcing at the coil and distributor cap; which is what I believe is causing the misfire. What is causing the coil to arc? Is the arcing causing the misfire?

Monday, February 4th, 2013 AT 8:04 PM

16 Answers

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,305 posts

Most likely that is causing the problem. Have you replaced the coil wire?

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Monday, February 4th, 2013 AT 8:57 PM
  • Tiny
  • Chriscampbell96
  • Member

Yes, I've replaced the coil wire every time I've replaced the wires.

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Monday, February 4th, 2013 AT 9:04 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,305 posts

Is the coil cracked? Explain exactly where the arc is located.

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Monday, February 4th, 2013 AT 9:05 PM
  • Tiny
  • Chriscampbell96
  • Member

I have not found a crack in it the only thing I have found is that it moves a little bit on the mounting bracket. It's arching right where the wire connects to the coil and then where the other end of the wire connects to the distributor cap.

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Monday, February 4th, 2013 AT 9:15 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,305 posts

Can you tighten the mount? Also, have you checked for cracks?

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Monday, February 4th, 2013 AT 9:19 PM
  • Tiny
  • Chriscampbell96
  • Member

The coil still has rivets in it from the factory holding it to the bracket. I have once but I'll go look it over again.

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Monday, February 4th, 2013 AT 9:21 PM
  • Tiny
  • Chriscampbell96
  • Member

Where is a crack in the coil most likely to be at?

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Monday, February 4th, 2013 AT 9:23 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,305 posts

Near where the coil wire goes on. Is it arcing to the mount?

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Monday, February 4th, 2013 AT 9:25 PM
  • Tiny
  • Chriscampbell96
  • Member

I didn't find a crack but I guess there is always a possibility of a hairline crack. I don't believe it's arcing to the bracket but I can't check right now bc it's not dark outside

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Monday, February 4th, 2013 AT 9:32 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,305 posts

Let me know

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Monday, February 4th, 2013 AT 9:38 PM

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