I have a '96 GT with a full terminator swap done several years ago. I am running the '96 return fuel system. If I turn the key and wait a couple of seconds for the pump to run and then turn to start, the engine fires immediately. If I try to start the engine without doing this it will crank for a few seconds before firing. I have replaced the fuel pump and fuel pressure regulator with no change. Any suggestions would be appreciated. Thanks in advance.