05-12-2022, 01:01 PM
Dubs you may have already checked this but do you have 12 volts on all four black/white wires on the fuel injectors?
They are fed from the +12 volt " fuel cut" relay.
just unclip one and check for 12 volts on the black/white wire with ignition and killswitch on.
They get pulled to ground by the ecu and have back-emf diode protection in the ecu circuit across the transistors/fet's.
If the ignition switch was off the ecu had no power and was only connected to ground and the controlling injector circuits should not be damaged because they were not activated.
Good job with the starter fluid, divides the problem in two parts right there, golden.
Do you have a circuit diagram to work things out?
They are fed from the +12 volt " fuel cut" relay.
just unclip one and check for 12 volts on the black/white wire with ignition and killswitch on.
They get pulled to ground by the ecu and have back-emf diode protection in the ecu circuit across the transistors/fet's.
If the ignition switch was off the ecu had no power and was only connected to ground and the controlling injector circuits should not be damaged because they were not activated.
Good job with the starter fluid, divides the problem in two parts right there, golden.
Do you have a circuit diagram to work things out?