1990 GMC Jimmy to much gas

1990 GMC JIMMY
150,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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SKEATER
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Replace throttle body with rebuilt has new parts on it still to much gas also replace computer.new map unplug map it idles wont move it bogs down plug it in wont idle how about coolant sensor?,
Aug 30, 2014 at 3:44 PM
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JACOBANDNICKOLAS
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  • 110,194 POSTS
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It could be the coolant sensor. Have you checked for trouble codes? Have you checked to make sure there isn't too much fuel pressure due to a bad regulator?
Aug 30, 2014 at 7:35 PM
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SKEATER
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Yes I did put a new one on my old throttle body,then I got a new one with all new parts on it. I did change out the coolant sensor.new o2 sensor,plugs wires ,EGR valve.how About the fuel press.Sensor,timing chain its not back firing. Thanks Skeater
Sep 3, 2014 at 8:45 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Since you have done all of that, I would check fuel pump pressure. If it is within the manufacturer's specs, I would suspect that the injection spider needs replaced. Actually, it was a common problem back then.
Sep 3, 2014 at 8:08 PM
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