1990 Chevy Truck Running Rich

1990 CHEVROLET TRUCK
133,000 MILES • 6 CYL • 4WD • AUTOMATIC
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MBOSLOPER
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  • 1 POST
I've inherrited a 1990 Chevy K1500 with a 4.3L engine. Replaced Catalytic Converter and Oxygen sensor. Exhaust still smells and engine still running rich. Idle runs a bit high. Any suggestions? Possibly an internal engine problem?
Oct 9, 2009 at 12:38 PM
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DOCFIXIT
  • ✓ASE Certified Mechanic
  • 18,828 POSTS
  • ASE Certified Mechanic
Maybe TBI bleeding and causing rich mix. Hook up timing light aim at TBI spray should be fine and 360 deg patteren . If you see droplets then ijn. needs replacing
Oct 9, 2009 at 1:05 PM
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