EFIDynoTuning Forum

Got sick of fighting with 20+ year old wiring harnesses.


So i bought an ms3 gold box and harness lol.



Looking to delete on the stock pcm, run the efi components through the new harness and splice the ancillary controls from the ms3 into the pcm plug.



What all does the pcm control besides the obvious EFI stuff?

Going off http://www.efidynotuning.com/pinouts.htm looks like AC/HVAC are the only big stuff I see outside of usual EFI stuff like Fuel Pump Module, EVAP, and tachometer. I assume the MS3 is capable of controlling fan outputs which go through the CCRM.

There is no fuel pump module on 94-98s lol.



Plan was to have the ms3 trigger the various functions of the ccrm.



This version of ms3 has relay controls in it. So it has AC, fan, and pump triggers.



If i wasnt deleting the stock engine bay efi harnesses, i was going to do an eec v plug to the ms3 plugs.

That's what I thought as it's a return system, however the CRAI8 pinout shows FP Module on pin 12.

If I had a FSM this would be so much easier.


But this is like the only chassis Ive ever worked on that you couldnt source a free FSM for.



Ive gotten digitized datsun FSM's from the 70's and translated sections for some of nissans JDM only engines in the late 00's online for free and for the life of me I cant find a single source for the 98 gt's that isnt a monthly subscription or a c note for a CD.



And whats more is because there such an inbetween model year they have a lot of minor differences between the 96-97 cars and the 99-02's



To the point that it makes using anything BESIDES the factory FSM an exercise in futility.