Locating fuel pressure leak (Pump, pressure regulator, or injectors)
I still have a slow pressure leak (89). Primes to 42psi, stops at 38, and drops slowly before ignition is on.
I tried the technique of clamping send / return lines to isolate where the leak is coming from, but no configuration of clamps held the pressure. I believe if pressure holds when you clamp the send line, the pump is bad. If pressure holds when you clamp the return line, the regulator is bad. And if you clamp both lines and still have a leak, then an injector is leaking.
Well, no matter what we clamped, it leaked. I have already installed a new fuel pump and fuel pressure regulator, and my injectors show health Ohm resistance (though I know this means that they can still be leaking).
Video is us crimping the send line, and as you can see when we un-crimp it the pressure plummets. Same outcome if the return line is crimped in addition to the send line.
I tried to delete my fuel pulsator incase it was shot but it didn’t change anything. Please help