Turbo bondo 7

ok guys im sorry if this has been posted befor... i was just wondering if anyone knows the exact wires that go to what... from the internal wiring harness from the 86-88's wich wires go where... here is what im trying to do:

i have an 85 rx7 that im building a 6port 13b from an 87. i want to use the stock computer and the wiring harness. i cut the internal harness off the 87' and want to tie it in to my 85. i just would like to know if anyone knows that color on the cut harness goes to what voltage/ground/ ignition, run start... also the coils... i need to wire then up as well as the CAS. somone please HELP i can paypal someone some money if they have the exact answers to my questions PLEASE and thank you!
aaron

trochoid

iTrader: (6)

Won't work with the SE ecu. Go back and get the rest of the S4 harness, ecu and all of the sensors and all of the intake to the afm. Read up on the TII swap and wiring changes, get a copy of the wiring diagrams for both years.

Directfreak

iTrader: (2)

Turbo Bondo 7:

We need lots of pics of your car. Inside, Outside, and Engine Compartment.

steve84GS TII

The smaller left side engine harness does not have to be tied into the 1st gen harness.What you will be doing,is making an entirely new harness to power up and operate all the left side running gear for the S4 engine.

This will consist of most of the wires on ECU gang plug #1.Its the one plug that is not part of the big,right side engine harness that is plug and play between the ECU and engine.Some of the wires are not needed,since they arent used on the 1st gen.The best thing top do with them is to open the yellow gang plug and de-pin them.The remaining wires will provide the following services.....

Power to ECU both full time and switched
Power/signal to coils/ignitors
Power to fuel pump
CAS signal

Once you have the 12-15 wires isolated on the yellow gang plug,just solder and shrink tube some long wires to them and wrap them up.Then,run the new harness under the dash and over to the left side of the engine bay where you will solder and shrink tube all the appropriate plugs onto the wires,in order to plug them into the components listed above.Its quite simple and the entire left side harness is only about the thickness of a finger. All the rest of the big FC dashboard harness can be scrapped,its not needed.

You need to obtain an FC underhood fuse block,main ECU relay and circuit opening relay to do the job cleanly.These items will safely and properly, power up and fuse the ECU and engine electrical components.It will also make it possible for you to install the FC engine without cutting,splicing or otherwise violating any part of the FB electrical system.The 2 big wires from the ECU main relay will lead to the big black wires on the factory FC right side ECU harness.They provide main power for the 4 injectors and the various solenoids located on the engine.They will not lead to the ECU,rather the tie into a large,unused gang plug higher up on the left side harness.The circuit opening relay is used to power up the fuel pump safely,using the signal from the ECU,which is switched on by the AFM or check connector.Its a simple wiring job since the S4 N/A does not run the relay/resistor pack of the TII and S5 engines.
Get an FSM for the year engine you are going to run and read it.All the info you need is there,from the 1st wire to the last,in very clear detail.I consider the FSM required material for anyone doing an FC engine transplant.I relied heavily on mine for both my S4 and S5 engine swaps.
Also,info pertaining to TII swaps is relevent to your swap.The wiring needed is identical for N/A and TII engines within a given series (S4, 86-88 and S5, 89-92)

Turbo bondo 7

thank you for all the help i was wondering the spacific wire/pin color guide. someone should put one togeather and sell it!!!
aaron
thank you!!!!

steve84GS TII

Actually,Im in the process of doing that right now.
Not as a mass produced or buisness type thing,just prepping a few as they are needed.
I have an S5 harness thats tagged and de-pinned,Im still working on one for someone else who is doing a S4.Not the whole harness mind you,just the #1 ECU gang plug with all the extra wires removed and the neccesary wires identifed and explained.

Musclefella

What if someone is going to use a standalone management system?? Would it be plug and play and is it going to work without rewiring some stuff??

I'm taking an 87 N/A fc engine out right now and all of the wiring as well. Only thing is the wiring under the dash. I'm also looking into the wiring up the dash part. So alot of visual info is welcome.

Gr Muscle

steve84GS TII

Standalone is precisely that....stand alone.

It requires none of the factory FB or FC wiring harness' or ECU's.
Everything can go off the FC engine,except for the injectors and a couple neccesary sensors(temp,TPS,O2,CAS)
Youll be laying out a new,simple wiring harness from the ECU to the engine.Youll also need to send fused/switched power from the main fuses and igniton to the ECU, and a power wire to the fuel pump.
In all,not much to do,MUCH less than the stock EFI which has tons of solenoids,relays and sensors for the more complex metered air EFI and smog gear.Wiring a standalone is a simple job requiring little to no intrusion into the stock 1st gen wiring harness.The downside is that it has to be tuned from scratch,whereas the factory EFI is ready to run.

Musclefella

That's great info there steve. I'll strip as much as i can and take all the sensors. I'm going turbo and i'm gonna be using a 3.5 map sensor with a standalone(don;t know wich one yet) so this metered air EFI(Mass air flow meter?) and smog gear(EGR like system??) shouldn't cause a problem right?? I don;t have emission problems over here cause the car's an old timer.

I've been tuning Honda;s for ten years and standalone systems are mostly plug and play nowadays on them and can be used with stock wiring.Tuning from scratch shouldn't be a problem, and i'm looking forward to it cause i'll learn alot from tuning the engine. This is my first time messing with rotary engine's, new technique, loving it.

Thanks for info again,

Sorry for the little hijack but it's wiring related