Car: Nissan 240SX
Engine: KA-24 4 cylinder
Low-z Injectors, Honda resistor box 6.5 Ohm
Hall trigger mounted in distributor, sensing a 4 window wheel.
ECU #2168 (Order #3255)
Car ran well every day for a week.
Then, one day the Fan output(P259 Ch01) stuck ON, and later, it lost fuel Injector Ch 03 (Pin 20)
I changed the fuel Injector to Ch04, and the Fan to P259 Ch6.
I checked the GND5 connections, they measure 0.1 Ohm between them. Main Ground is 12 awg wire to engine block.
I checked the Flyback wire. The Flyback wire is ran to the 12v input to the Honda resistor box. The resistor box has a common 12v supply, then branches out to the 4 injectors.
Also, I added a wire from the Ignition output (IGBT 20) to the car's OEM Tachometer.
Today, the ecu lost the Injector Ch04 driver