ON EARLY MORINING START UP ENGINE MISSES AND RAW...

  • Tiny
  • dodermott
  • 1996 GMC Jimmy
  • 187,952 miles

On early morining start up engine misses and raw fuel comes out of the tail pipe, get a miss fire code for cylider #3, Had these Items replaced plug wires cap and rotor spark pluges and #3 injector. Still have same problem the odd thing is once it up to Operating temp the missing goes away but their is stil a slight hesitation like a cylinder is droppiing.
Any Ideas? The dealership has no Idea what is causing it.

Thanks.
david

Tuesday, November 27th, 2012 AT 4:22 PM

2 Answers

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

Check compression when the engine is cold. SOmething tells me cylinder 3 may be low.

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Tuesday, November 27th, 2012 AT 4:27 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

After thought. Check fuel pressure.

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Tuesday, November 27th, 2012 AT 4:28 PM

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