Help please. Car won't start or starts and runs rough with high idle. It just started doing it a week ago. I have done most of the tests posted in the sticky. The odd part is that when i turn the key to "on" the fuel pump do not shut off after a couple seconds but continues to run. I can hear what sounds and feels like fuel flowing at a high rate through the fuel return line. I have replaced the fuel pressure regulator in the belief that it was the problem but no luck. If I turn the pressure up to 50 or 60 psi on the meter mounted at the shrader valve the sound stops. What the @%^^&*(&^$* is going on? This is on a 91 GT 5.0 with HCI, exhaust, etc., etc.