89 gmc searria cuts back when on the gas

Asked by Ryan97803 Apr 14, 2020 at 05:27 PM about the 1989 GMC Sierra 1500 C1500 Extended Cab LB

Question type: Maintenance & Repair

Truck starts up fine ,put it in gear press the gas it
stalls like it wants to cut off, and sometimes does.
Is it the fuel pump or the egr?

4 Answers


or the fuel filter first check it then fuel pressure....

1 people found this helpful.

@Kelly, I found out what was the problem. I had two sparkplug wires mix up. Starting to run fine, riding down the road it stops. Turn the key nothing. This is what I have changed on the 89 gmc. Alternator, starter, sparkplug and wire, fuel pump fuse, module under the distributor cap, egr, battery, throttle sensor, 5pin relay, idle air control sensor. I stump

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