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1998 GMC Sierra Missfire

Tiny
MIKE1958
  • MEMBER
  • 1998 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 320,000 MILES
Just had the distributer changed as the drive cog splines were worn and it let go on the road, since it has been changed I get a intermittant missfire and there is a power dropoff when under load or going up hill it misfires as well when changing gear.
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Thursday, May 8th, 2008 AT 5:24 PM

2 Replies

Tiny
QUAGMIRE
  • MEMBER
  • 10 POSTS
Have you replaced the plug wires? My 1999 would miss, but only between 50-55 mph under load. I changed plugs and wires and runs fine now.
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Saturday, May 10th, 2008 AT 2:57 PM
Tiny
MIKE1958
  • MEMBER
  • 2 POSTS
Thanks for the reply but problem fixed It was the new Distributer, would you beleive it, it would not calibrate and the bogging was due to a drop in fuel presure at 3500 rpm pressure droped below 55lbs
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Monday, May 12th, 2008 AT 3:26 PM

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