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1999 Chevy Suburban #2 Cylinder misfire

Tiny
WMM83PACK
  • MEMBER
  • 1999 CHEVROLET SUBURBAN
Engine problem
1999 Chevy Suburban V8 Two Wheel Drive 121000 miles

The Service Engine Soon light illuminated and I had the fault codes downloaded. The code was for the #2 cylinder misfire. I reset the code and pulled, cleaned and regapped the #2 plug. The light came on again. It seems to occur only when the engine is under a heavy load (pulling RV uphill). Given that the condition seems to occur only under a load, what would you suggest on the correction sequence?
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Wednesday, December 26th, 2007 AT 1:45 PM

1 Reply

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
I suggest first doing a compression test, if that is good swich all the #2 components with a different cylinder (wires, and plug) if the missfire changes to that other one and goes away on #2 you know what to change. Check the dist cap for carbon build up.
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Friday, December 28th, 2007 AT 9:59 AM

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