Hope that solves it. I prefer a fuel pressure test, usually during a road test pump pressure will drop if its bad.
Drove a malibu around for 2 days before i saw fuel go away, turned out it was aftermarket anti-theft would drop the circuit. enough to drive a man crazy.
Yeh, don’t like throwing parts at things. But with no good way to test it... I’d bet none of that was ever changed, so figure its not a bad idea anyway with that filter in the assembly like that.