1990 GMC Jimmy to much gas

SKEATER

MEMBER
1990 GMC JIMMY
5.7L
V8
4WD
AUTOMATIC
150,000 MILES

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.

Saturday, August 30th, 2014 AT 3:44 PM

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

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?

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Saturday, August 30th, 2014 AT 7:35 PM

SKEATER

MEMBER
2 POSTS

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

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Wednesday, September 3rd, 2014 AT 8:45 AM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

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.

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Wednesday, September 3rd, 2014 AT 8:08 PM