Still having a run issue. At this point I’m unsure if it’s a ground problem, an ignition problem, or an ECU problem.
The fuel pump still will cycle at the start, the engine may/may not start. Though shortly after the start, the fuel pressure bleeds off and the car stalls out. There are 2 real options I want to test this weekend first.
1. Is the spark signal from the TFI reaching the ECU to maintain the fuel pump in a run situation?
2. is there a newly surfaced ground issue at the ECU on fuel circuit that only surfaces in the run condition?
Part of me thinks it’s better to disconnect all of the stock fuel pump wiring system and start from scratch utilizing the “blue” ground signal from the ECU as a trigger. Which won’t really help at this point if the issue is ignition signal related, but would allow a battery direct source for power (the battery is only 24” from the pump”.