crank but no start

I have a 2001 Mustang GT that turns over and runs very rough for a few seconds and then turns off. When I turn to start it back it will try but will not turn over. After waiting a little while it does the same start for a second rough and cuts off. When I give it gas it try’s to run really rough...

2003 V6 Mustang. In dry weather, the car just starts fine. In humid weather, especially after it rains; it doesn't start, but still cranks. I checked the ignition on one of the spark plug wires with an ignition tester and the spark is there. I also tested the fuel pressure at the schraeder...

Looking for some help or advice. I've just recently rebuilt my 1991 LX with a 408 stroker motor and MSD ignition system, and Aeromotive Fuel System. Here is what has been done so far: Verified fuel pressure running around 42PSI, and the motor has great compression, problem seems to be with the...