I have a 93 ta that has been giving me problems for about two years now. When the problems started the car would die randomly and not start back up for a few hours. After checking my pressure at the fuel rails I noticed my pressure was about 20 psi low. I replaced the fuel pump yesterday and went to start her up and nothing.... I came out to the garagethis morning to try it again and it fired up after a couple trys but shutoff about 2 mins later and now wont start again
..... any ideas?? Parts I know are good(icm, coil,fuel pump, and recently new opti)

 

Also when the car dies it does not stumble or anything just shuts off like the key was turned off

 

Start by having a gauge on the car the entire time to see what your pressure is. After that if the pressure is 41-47 the entire time then check spark. You could sheck spark and fuel at the same time to see whats going on and whats not. If the new pump has low presure as well then maybe your fuel sending harness has a weak ground or power wire. this is very common on GM fuel harnesses, look where the wires inter the gas tank cap assembly I think there purple,black,grey they go into a little rubber like block. In that area the wires tend to get hot and short out ALOT! But you need to start with the basics and go from there, Fuel spark ect.