Canadian Wheelman

I have a few too many boxes trying to override my computer in my 87 951, and am planning on removing some of them. I just added the autothority maf kit, allong with the 2 chips that were installed in the 2 computers. These chips replaced a previos autothority chip, and the chip that comes with the vittesse racing piggyback. The vittesse racing piggyback is still hardwired into the harness, and the car won't start without it. I plan to remove this from the harness.

There is also a zietronix data logger in the mess as well, with wideband, egt, and vacume sensors.

Is there any chance anyone has a wiring diagram or pinout for the vittesse piggyback, I bought the car with this installed, and have NO information about it at all.

I also found 2 resistors in line with the Grey and Grey/black wires, and don't know what they are a part of (piggyback, datalogger, stock, other?)

Below is a picture of the resistors...

Airflite40

what kind of injectors do you have?? those resistors could be for the injectors.

Canadian Wheelman

I'm not sure what brand or impedance, but they are 55 pound injectors.

Correct me if I am wrong, but wouldn't there be 4 resistors (1 for each injector) if it was for dealing with impedances?

Airflite40

then most likely they are for the injectors, you need 2 resistors because the injectors fire in pairs..... ala batch fire

Calmchaos

Yup only 2 wires run from the DME for the injectors.
1 and 2 fire together as do 3 and 4.

And FWIW my injector wires were the exact same color.

lee101315

I think you mean 1- 4 and 2 -3.....