As stated in the OP, I circumvented the battery with the dead cells and tested to make sure I was getting operational voltage to the circuit. Obviously, a new battery would be ideal but I’m 99% sure that isn’t the problem. Test results on fuel pump electrical system came back the same as when the battery was and wasn’t circumvented. If you have any other suggestions, I’d love to hear them. I will replace the battery eventually, but I’m focused on diagnosing the actual issue with the fuel system. This was a friend's car that I am flipping, not a daily so I’d rather wait to put a battery in it so it doesn’t sit and drain. Don’t want to fool with putting it on a tender.
Saturday, September 9th, 2023 AT 5:01 PM