I got the Circuit Sports TT harness from FRsport, also I have the pdf manual for the TT.
I was reading through it about the 3 extra wires, the white, black and grey.
I know grey goes to the Ebrake switch, black is ground and white, goes to the O2 wire going to the ECU, or so the manual says. I want it to give me A/F ratios.
so my question is does the white wire actaully go to the O2 on the ECU, I've read that it taps in to the speed wire and also the tach signal? also that for it to work the ground has to be spliced into the ecu?
btw, its a 89 hatch, with an kouki(I believe) s14 sr20det.
