I’m trying to determine if the check valve is faulty on my new Delphi fuel pump (for 1995 Chev Camaro), before moving on to checking other reasons for low initial fuel pressure. On this video (Fuel Pressure testing, they use a bunch of adapters and fittings to put a gauge inline with the pressure line before it gets to the fuel rail. Then they clamp off the line after the gauge and determine that pressure is good, before dropping in the fuel rail/injectors.
I’ve rented/borrowed fuel pressure gauges, but they don’t really come with the parts needed to do something like this. What’s the easiest way to get a gauge on the pressure line? Or is there another way I can determine if the fuel is draining back into the tank?