i have a 1996 mustang GT i had the transmission replaced due to not having time to do it. when they replaced it they did not put the inner finder back in and when i turned a corner i caught the ecm's relay moduel (located under the passenger side inner finder) it shorted out and the car died i replaced that moduel the ECM, the fuel pump, the fuel relay, and the fuel filter and i am still not getting any fuel pressure. the fuel pump is coming on for about 2 secs and not pressurizing the system completly. i am getting spark and everything and if i put a small amount of gas in the air filter while i am turning it over it will start for a minute but i cant keep the fuel pump going enough to start the car  

Well if you had a busness change your tranny and they did not put the finder back in they should fix it..  Also you might and see if you could of some how tripped the roll over switch for the fuel pump. Mine is in my trunk next to the passager tail light. I have a 95 gt yours might be diff. you have to take off the carpet/molding to get to your tail light or call a dealer and they can tell you how to reset it.  

checked that thanks though  

I would check all powers and grounds to and from all the relays that got damaged.  The fuel pump will run for a few seconds when the ignition key is first turned on. When the pcm doesn't see engine rotation it kills power to the pump relay.  If no luck, try jumping the fuel pump relay to get the pump to run all the time and try to start it.  If this doesn't work you probably have a pcm problem.  Don't forget to check your crank and cam sensors.  

YOU SHOULD TRY CHECKING YOUR PATS OR WHAT IS CALLED YOUR PASSIVE ANTITHEFT SYSTEM THIS WILL LET YOUR CAR RUN FOR A FEW SEC AND THEN IT WILL DIE BECAUSE THE COMPUTER THINKS THE VEHICLE IS BEING STOLEN YOUR VEHICLE MY NEED TO BE TAKE TO LOCAL DEALER FOR RELEARN PROCEDURE  

I also have a 1996 GT and i an extra CCRM thich is the module under the right front fender, I had similair problems, no fuel pressure but pump turns on.  This is what fixed it for me.