I REPLACED SPARK PLUGSWIRESROTOR BUTTONCAP ETC ...

  • Tiny
  • Anonymous
  • 1997 GMC C1500
  • 450,000 miles

I replaced spark plugs, wires, rotor button, cap etc and still have a miss in number 5 and 7 after it warms up. Works fine when cold. I even had injectors flushed.

Friday, March 1st, 2013 AT 1:45 PM

1 Reply

  • Tiny
  • hmac300
  • Expert
  • 44,308 posts

Check compression in those cylinders acheck fuel pressure if low causes this, check for a vacuum leak.

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Friday, March 1st, 2013 AT 2:05 PM

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