Thanks Richard. I don’t yet fully grasp concept of how the H3 unit uses (+) and (-) voltage to trigger the system. As for the low rail voltage, is this pre or post cranking? My car has a pretty low idle. When I rev it up while taking the reading I saw over 14 volts at pins 5, 12 and 23.
Beefing up my fuel pump and injector cables poses a bit of a problem as it would require considerable modification to my wiring harness. I could possibly reduce the load been drawn by the fuel pumps by running them straight from the battery and using their current supply from the ECU to activate a relay. Would this solve the low rail voltage problem? If not the modifying the HFS-3 might be my only other option.
Cheers, Orlando