misfire on 1 and 4

2007 JEEP WRANGLER
53,000 MILES • 6 CYL • 4WD • AUTOMATIC
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CLOUWIEN
  • MEMBER
  • 1 POST
has no spark for 1 and 4 cyl. also scanner shows no pulse width for those cyl. replaced coils, plugs and wires. not sure where the coil gets its feed from or what voltage should i see at the plug in
Feb 17, 2011 at 9:37 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,837 POSTS
  • ASE Certified Mechanic
Hello,

Yep no pulse width for individual coils means the PCM coil driver has gone out from those cylinders and the PCM needs to be replaced.

Here is a guide on misfires in general so you can check that out as well.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
Jun 21, 2017 at 7:12 PM
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