I tried to jump start my sc compressor it worked and then I turned off my car and when I went back to start my car it doesn't start at all

Wet ecu due to leaking heater core

The car turns over won't start changed fuel pump and wouldn't start. Got to start run shot off started left alone 4 10 min or so. Won't start. Like ???? So I'm looking for the reason. Looking for the fuel relay. Everywhere I look shows different cars but I just wanna know about this one.

Car has trouble starting and will not crank on first try.