what interface is everyone using?

i got one from mastach and the instructions i recieved for it tell me to hook it up to pins that my car does not have. my car is a 94 btw

I just received mine from mastach and it works perfect! I have a 94 Z28 A4 also. I don't think you're hooking it up right. You should only be using the red, black and white wire.

The blue one is for 162bps TBI systems only, and your car does not have that pin!

Operator error is no reason to fault the product. Re-read the instructions instead of just looking at the picture above them.

It was the best $45 I ever spent on my Camaro, and that included lots of software and shipping from Poland.

I highly recommend www.mastach.com :bow: