You can use a proper fuel pressure guage and an adaptor and longer bolt to stack on the cold start injector line where it connects to the cold start injector with a banjo fitting. That spot is readily available on the upper intake manifold and provides a perfectly accurate fuel pressure reading. I know spending the dough on a guage sucks, do you have any mechanic friends that may be able to help you out? I'm just afraid that if you take it somewhere and pay for a FP reading, they're gonna automatically tell you its low and you need a new pump. Unfortuneately you pretty much need a guage to read the PRESSURE DROP as the engine stalls. Simply loosening that line will definitely reveal fuel flow (as long as the pump is running) but you won't be able to tell the pressure. And you'll get fuel all over everywhere.
Good Luck!
Ryan
