1997 GMC C1500 car running real rough

1997 GMC C1500
194,500 MILES • V8 • 2WD • AUTOMATIC
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COOKIEBJRX
  • MEMBER
  • 1 POST
truck runs real rough at high speed and idleing could this be exhaust gas regulator
Sep 11, 2008 at 4:47 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
For a start check the fuel pressure with and w/o the pressure regulator then report back your readings this is where we start and in order to continue.
Sep 11, 2008 at 4:52 PM
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