2004 TJ

  • Tiny
  • allen Thomas
  • 2004 Jeep TJ

Number 4 cyclinder not firing code. Changed spark plug, coil pack and injector. What next? Still running rough.

Friday, July 15th, 2011 AT 7:31 PM

1 Answer

  • Tiny
  • caradiodoc
  • Expert
  • 24,969 posts

Switch injector with one from a different cylinder to see if the code changes to that other cylinder. Chrysler has extremely little trouble with injectors, but if you already changed the ignition parts, that just leaves fuel and compression.

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Friday, July 15th, 2011 AT 7:54 PM

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