1993 GMC Sierra

1993 GMC SIERRA
28,556 MILES • V8 • 2WD • AUTOMATIC
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ARLIN
  • MEMBER
  • 1 POST
rough idle, weak accleration, misses while running. has new fuel filter, plugs and wires.
May 9, 2010 at 2:41 AM
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INTERNETMECHANIC
  • ✓Experienced Mechanic
  • 700 POSTS
I'd want to visually test for spark at the plugs. Plugs and plug wires could be good and you still have no spark somewhere. Also, use a gage and check fuel pressure. Some of the national brand autostores used to loan out a gage, if you don't have one. Are there any applicable trouble codes? The list of possibilities as far as no code diagnostics, is as long as your arm.

You have good compression on all cylinders?
May 9, 2010 at 3:54 AM
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