I wanted to share my install of the ProEFI into my 94 auto Supra. Jason, Adam, Larry, if there is something on here that doesn’t look right, please let me know so I can correct it.
Here is the install for the ProEFI which includes the following:
ProEFI 128 pin
Auto harness
Map Sensor
Fuel Pressure Sensor
Wideband Sensor
With the help from Adam at ProEFI, I put together the following which might help some when installing the MAP and FPS for a ProEFI in the future. Below I have broken out from the ProEFI harness pin through the factory harness, to the factory sensor plug and onto the ProEFI sensor with identifiers and colors.
This is the location of the two factory sensor plugs you need to use (T14 and T2)
Followed with the schematic of what you need to cut and splice in order to get these two sensors connected.
I first started with the FPS which taps into the TPS plug (T2) shown below
Here you can see I’ve cut the factory red wire and stripped the B/R wire, brown wire still needed to be stripped.
After soldering and adding heat shrink tube, I was finished with the FPS connection. I did wire up a ground to the shielded braid for the harness, but Adam said that wasn’t necessary.
I then started on the MAP sensor which connects to the factory Turbo Pressure Sensor (T14) plug shown below. This was easier than the FPS as you just cut the plug off completely and hook up the MAP sensor wires.
One wire down, 2 more to go
Here it is completed, again, with a ground wire connected to the shielded harness (not necessary).
Here you can see where the sensors are mounted and where the harness goes. FPS is mounted to the FPR, MAP sensor is mounted on the back of the manifold next to the block off plate.
I then stated on the wideband. The only difficult part to this is getting the harness into the cab to the ProEFI somehow. I chose to run the line through the firewall where the factory engine harness comes through. Here is the harness and wideband
I had to remove the stock ECU so I pulled the carpet and plastic panel and there it was, along with the TRAC module and GReddy BCC. That was actually the first time I saw the BCC.
I removed both computers and the BCC. Please note that when removing the BCC, you need to reconnect the Black/Yellow wire that was cut originally for the BCC. Below I’ve removed everything and you can see the wideband harness fished through the firewall.
Here is the ProEFI auto harness, not to be confused with a 6SPD harness as they are slightly different.