Also, as a note - my ECU starts up fine and is not throwing any codes
I use the same kit. Power/ground to the pump is coming from a relay that is connected to the battery. The blue signal wire for the OEM pump is still used to turn the relay on/off thoughThis is what I used to wire my walbro 450 pump and has a relay . It connects to the battery . Then you give a ground abs take the thick blue wire underneath the seat and splice into that triggering the relay . The red wire will connect to battery with a fuse
it was the shared ground for the fuel level sensor and fuel temp sensor. i found it by taking out the basket and checking every single connectionI am having something similar and can’t figure it out. Randomly car won’t won’t start and fuel pump won’t kick on. Which ground wire was shorting on yours? And how did you find it?