ryanguy426
Newbie
I'm back again with my never ending Suburban project
1994 Suburban 1500, 350 TBI. I put in a new Delphi fuel pump, and the truck ran great, started easily and consistently. The truck sat for 2 weeks, it's now a no start, and only 8-8.5 volts at the fuel pump connector. Code 54. Can't hear the pump running whatsoever even with an ear to the tank.
Any diagnostic tips? I already swapped the pump relay with the one on my Sierra, same result. Put 12v to the gray wire out of the relay, nothing. Jumped pin G on the ALDL connector with 12v, nothing. Cranking until the oil pressure hits 40, and nothing.
Runs fine if putting gas or starting fluid down the TBI.
My instinct is telling me to throw another pump at it, but the 8 volts at the connector tells me it's somewhere on the truck and not the pump. Curious if there might be something common I'm overlooking maybe? There's nothing obvious.
1994 Suburban 1500, 350 TBI. I put in a new Delphi fuel pump, and the truck ran great, started easily and consistently. The truck sat for 2 weeks, it's now a no start, and only 8-8.5 volts at the fuel pump connector. Code 54. Can't hear the pump running whatsoever even with an ear to the tank.
Any diagnostic tips? I already swapped the pump relay with the one on my Sierra, same result. Put 12v to the gray wire out of the relay, nothing. Jumped pin G on the ALDL connector with 12v, nothing. Cranking until the oil pressure hits 40, and nothing.
Runs fine if putting gas or starting fluid down the TBI.
My instinct is telling me to throw another pump at it, but the 8 volts at the connector tells me it's somewhere on the truck and not the pump. Curious if there might be something common I'm overlooking maybe? There's nothing obvious.