Looking for help. I have a 2006 Audi A3 with a BPY. Car would stall after a hot start. Checked codes and always had a low fuel pressure code. Have basically replaced all fuel sensors, fuel pump and swapped hpfp. Turns out the lpfp gets power when I open the driver door and turn the key on. But once I actually start it I see now power to the fuel pump. Have also replaced the fuel pump relay and crank and cam sensors. any ideas on what else could be causing this issue?