Hi everyone, first post here.
I have an old 1995 Camaro, 3.4L V6 with about 170k. It was my first car, and I’m trying to fix it up. About a month ago I was driving it down the road a bit and back after finishing some work on it, and the engine completely shut off. Wouldn’t start after that. I found that there was no fuel pressure and no fuel pump cycling on at all. Therefore I figured the pump was dead after several years.
I bought a new Delphi pump, pulled the tank out of the car, replaced the pump, cleaned everything up and checked the lines. After putting it back together, I’m getting about 10 psi (instead of 44 or so) when you turn the key to the on position. The pressure would correctly go to 44 if you connected 12 volts to the jumper under the hood that bypasses the pump relay.
Since then, I’ve gotten a replacement pump, replaced the fuel pressure regulator, fuel filter, pulled the fuel rail and cleaned that/replaced the injector seals. The pressure is still low on key turn, and the new development is that it won’t even hold that pressure and now returns to zero after about 30 seconds.