1997 Chevrolet 1500 Pickup Q&A
1997 Chevrolet 1500 Pickup Question: While driving truck died. Pour fuel in manifold & engine will run.
Untill fuel is gone. I have replaced the fuel pump & filter. Also removed fuel lines from top of plastic cover & blew them out with air. Only registering about 25 psi. of fuel pressure. I had fuel tank on bench & applied 12 volts to fuel pump & registerd about 60 psi.Put it all back together & 25 psi. again. HELP............ - doncam42
Fuel pressure regulator? - ziptie12
Agree with ziptie. Also check for restriction in the line or filter and any leaks! Burnt connector at the fuel pump from high resistance???? Pump sound like it's turning about the same now that it is back in the truck as it did on the bench with known 12 volts hooked to it, or about the same humming sound when pump is running as key is cycled? It is either a leak, a restriction or low voltage to the pump! IF it worked on the bench it should work in the truck! - pushrod
Try tapping on the fuel pump relay while cranking the engine and watch for pressure fluctuation. Relays are susceptible to oxidation on the relay points and connection to fuse box. If you see anything, try swapping the relay for another in the fuse block of the same type. then check pressure. - Rojo1