Hey guys.. I'm back with another one.. Originally my problem was the main relay was spliced to bypass the fuel prime circuit on ecu.. I bought a couple main relay's and borrowed another p28 ecu... Problem is now I will key on ignition pump primes car will start and idle for about 2-3 seconds and die.. Any ideas?

 

seems like the wiring is still off
if the ecu doesnt detect the car is on then it turns off the main relay

 

I'm going to dig into it more this evening when I get off work.. I'm gonna put a fuel pressure gauge on it and see if it holds pressure up until it dies.. I put a test light on the pump connection yesterday and I'm keeping power up until it dies