Fuel pump won't turn off

Asked by Apr 08, 2017 at 02:02 PM about the 1992 Chevrolet C/K 1500 Extended Cab LB RWD

Question type: Maintenance & Repair

We rebuilt the motor on a 92 Chevy 1500
Silverado and now the fuel pump won't turn
off. We have changed fuel pump, oil
pressure sensor, fuel pump relay, throttle
body sensor, and checked all fuses. What
else could it be?

2 Answers

12,870

You ether wired the pump wrong .. if you got the Pressure sw and FP motor backwards the pump with run until a fuse blows // or the new Pressure sw is bad (a new pump?) Put a pressure gauge on it

710

almost has to be the oil pressure switch stuck in closed position supplying voltage all the time. its made to where if the FP relay fails that it can still run the pump so your not stranded. check your power at the pump or simply unhook the connector on oil pressure switch!

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