You relly need a fuel pressur gauge. You can cobble together a cheap under hood one for a couple of buck at NAPA, Autozone, Ect

Check your electrical connections on the shut off.. (check for 12V with the wire hooked up..)
could be the shut off solenoid... you can take the plunger out, and put the solenoid back on.. you have to use the manual shut off.. but its a quick trick to see if its the solenoid or not...
Bryan