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1997 Other GMC Models erratic misfire

Tiny
WILLIEMOM
  • MEMBER
  • 1997 GMC
  • V8
  • 4WD
  • AUTOMATIC
  • 189,000 MILES
Just replaced the engine in my suburban. Now it is idling very rough and check engine light is on or flashing. Replaced the crank sensor. Scan code is showing erratic misfire. Next step to replace the Camshaft position sensor?
Monday, July 21st, 2008 AT 7:46 AM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Those CPI engines were good for sticking injectors after you disturb them. If you scan th ePCM or watch "misfire data" on a scanner it will tell you which one is stuck. Need to verify this as it may be more than one that is not working. Its a little pricey, but I suggest the updated injector for your Sub, it eliminated the extra valve that sticks, from A/C Delco
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Monday, July 21st, 2008 AT 7:53 AM

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