1998 GMC sierra boggs down and then dies when stopped. Changed the fuel pump spark plugs and sensor possible

1998 GMC SIERRA
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JESSICAJ5182
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  • 3 POSTS
The truck has a 6 cylinder motor newly rebuilt ...
Oct 15, 2011 at 2:54 PM
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DAN_K
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  • 213 POSTS
  • ASE Certified Mechanic
Is the check engine light on? Are there any Diagnostic Trouble Codes (DTCs) present?
Oct 15, 2011 at 3:44 PM
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JESSICAJ5182
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  • 3 POSTS
No check engine light..
Oct 15, 2011 at 4:52 PM
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JESSICAJ5182
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  • 3 POSTS
Oops. Sorry I have changed every possible sensor
Oct 15, 2011 at 4:57 PM
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DAN_K
  • ✓ASE Certified Mechanic
  • 213 POSTS
  • ASE Certified Mechanic
Have you checked for proper EGR operation? How about for vacuum or un-metered air leaks? Also check the IAC (idle air control motor) and circuit.
Oct 15, 2011 at 6:11 PM
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