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Ok so i didn't check pressure at the fuel filter due to waiting for parts to make an adapter per one of the stickys. I used a hose from a siphon i had and used hose clamps to secure it to my pressure tester and the larger diameter pipe going into the spider. The bleed down was way better not perfect tho. It held above 55 for about 6 mins. This is a new pump btw i had one already because the vehicle has been sitting with old gas in it for years. I also went as far as to remove the intake manifold or what ever its called and look at the injectors and regulator. No fuel leaks not even at the ends of the injector when i pulled them out.
Is it possible for the regulator to be bad and not leak externally. Because when i hooked it back up and ran the pump from fuse box so i could watch the gauge better. It leaked fast again. If i taped the wire fast enough to make it not hit 60 it would leak down slower. But it it hit 60 sometimes it would drop immediately to 40 something.
When you get the parts in please complete the pressure test at the fuel filter but for now the intake looks like the bigger problem. Yes the regulator can leak back into the return line to the tank internally. That or the assembly leaks into the intake (usually shiny clean spots) or injector(s) leak into the cylinder(s) (fouled plugs, gas smell, gas in the oil). You can block off the return line with a fitting or a clamp if there is a rubber hose section for testing purposes. I don't remember the return plumbing from the intake to the tank.
The pump brand is trugrade. I got it from autozone. I will try and find a spot to block the return line this weekend. I didn't see any clean spots in the intake nor any fuid coming from regulator or poppets when they were removed.
We strongly recommend a Delphi or AC Delco fuel pump because the aftermarket brands have such a high failure rate. Finish diagnosing your intake pressure issue and then test at the fuel filter.
I realized I could use the same method I used earlier to test fuel pressure at the outlet side of the filter. It passed with flying colors. And I also figured out a way to pinch the return line using a handle little hatch the previous own left to make changing the fuel pump easier. Found it after I changed it the hard way lol. It's holding pressure great.
So I'm guessing it is the fuel pressure regulator.
New fuel pressure regulator installed and it still has the same problem. Pressure is bleeding somewhere i can't see even with the manifold removed and pop-its popped out i can't see any fuel.
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