This is driving me crazy! I bought a commander 950 to replace my stock computer in my 92 T/A and cant figure out which wires in my stock harness I need to repin in order for everything to work as it should again. Mainly the speedo. The pinouts I found dont really tell me much. I wish this was easier!!! Can anyone thats done this before help me?

 

For the speedometer and cruise find a 4-out buffer box and wire that in. They were used on the later MAF TPI Firebirds along with the '90 - '92 TBI cars (and some Caprices).

RBob.

 

Ok where, on the car, can I find it? And how does it wire up?

 

Just lookin through all of my Holley c950 stuff and the manual says that this ecm has a vss pin. I just need the pin out of the stock plug that goes to the stock ecm. Anybody got one?

 

try eficonnection ???