iv got an 86 trans am im working on and a nice speed density ecm and harness sitting around that i want to put in it. would this be a direct swap? in other words would i have to repin the SD harness to work properly with the stock bulk head on the firewall? its an 86 trans am TPI 305. thnx much

 

Best bet is to check out Mike's site:

http://www.eecis.udel.edu/~davis/z28/ecm_swap_730/

He details what is required for this swap.

RBob.

 

thanks but i think thats telling me how to use my MAF harness with the speed density ECM. i have the harness for the speed density and want to know if it will work with the bulk head on the fire wall.


UPDATE: finnaly found a good thread, just took some fancy searching lol! for anyone else asking (will my 90 TPI wiring harness/ecm work in my 86-89 car) here is the thread. https://www.thirdgen.org/forums/engi...ap-engine.html

 

There are a couple of things in that thread that aren't addressed because that car is newer than yours. You already know about the brake warning switch and the wiper harness (both CAN be removed in one piece), but you may not know about the fuel pump wire. The fuel pump wire in your 86 comes into the dash harness by the ECM, not the firewall connector. You will need to add a wire to the firewall connector to run the pump.

You DO know you will also need to replace the wiper motor and washer bottle, right? Either that or swap the wiper harnesses from the old harness to the newer one.

 

Ahh icic thanks for that! that could have been a headache. as for the wiper motor, im sure i can find something at a scrap yard. thnx for the input.

 

Head over to Austin ThirdGen and there will be a pinout for the C100 and the C207... You'll need both. I only have what's relevant for the V6 in my 302 to 730 swap guide.

BTW, you can't just get the wiper motor and be done... Our wiper motors have the washer pump connecting within the timer cover. The 88+ have the washer pump in the washer fluid bottle. You need the bottle as well.

 

Alright. thnx much!