JJCross1994
Probationary Member
- 4
- 0
- Nov 28, 2022
-
Valdosta,
Georgia
I've been fighting this for a while and I'm so close to being done. Any help is appreciated!
Basically I've wired a 1992 1G Turbo ECU into my 1995 Mighty Max running a Turbo 4G64 8V setup. I'm using factory distributor with the 1G CAS trigger wheel in the base. I'm on a dual coil setup with appropriate PTU. I have re-pinned my factory ECU harness to match the 1G and the MPI relay.
I have spark, crank signal, RPM signal, and injector pulse on the scantool. Base timing is set @5⁰ TDC w/ light. The problem is even though the ECU is showing the injectors are pulsing, it's not actually grounding the injectors. Verified harness is good and appropriate wires match in the ECU connector. Verified all chassis ground and ECU grounds are good. I do not have the resistor box wired in yet (sitting on my tool box), but unplugged from the injector I still get nothing on a noid light, even though the ECU says they are suppose to be firing.
Only fault code is for the knock sensor (haven't added one yet). I'm using the truck TPS/ISC. I haven't quite figured out where Pin #2 on the trucks stepper motor for ISC should go in the ECU pinout as I'm not aware of it's a 12V, 5V sig/ref, or ground wire. I had to remove it from it's original slot to make the sensors ground pins match the 1G ECU. TPS and Stepper motor are reading on the scantool as well though.
I'm lost here.
Update: Just looked over my notes for the 100th time and I forgot to add pins 63&66 to the ECU to the MPI ground circuit. I'm guessing this may be my problem? Anyone know what 63&66 actually control?
Basically I've wired a 1992 1G Turbo ECU into my 1995 Mighty Max running a Turbo 4G64 8V setup. I'm using factory distributor with the 1G CAS trigger wheel in the base. I'm on a dual coil setup with appropriate PTU. I have re-pinned my factory ECU harness to match the 1G and the MPI relay.
I have spark, crank signal, RPM signal, and injector pulse on the scantool. Base timing is set @5⁰ TDC w/ light. The problem is even though the ECU is showing the injectors are pulsing, it's not actually grounding the injectors. Verified harness is good and appropriate wires match in the ECU connector. Verified all chassis ground and ECU grounds are good. I do not have the resistor box wired in yet (sitting on my tool box), but unplugged from the injector I still get nothing on a noid light, even though the ECU says they are suppose to be firing.
Only fault code is for the knock sensor (haven't added one yet). I'm using the truck TPS/ISC. I haven't quite figured out where Pin #2 on the trucks stepper motor for ISC should go in the ECU pinout as I'm not aware of it's a 12V, 5V sig/ref, or ground wire. I had to remove it from it's original slot to make the sensors ground pins match the 1G ECU. TPS and Stepper motor are reading on the scantool as well though.
I'm lost here.
Update: Just looked over my notes for the 100th time and I forgot to add pins 63&66 to the ECU to the MPI ground circuit. I'm guessing this may be my problem? Anyone know what 63&66 actually control?