ok ive searched and searched and attempted diff things and im at the end of the road here. i just swapped a t56 into a 92 formula tpi. ive attempted to get the wiring done on the digi box no luck here is the set up i have now.
1 POWER =SWITCH POWER FROM FUSE BOX
2 GROUND- GROUND TO BODY AND T56VSS GROUND
3 INPUT-FROM T56 VSS
OUPUT 3 ECM SPEED SENSOR
ive only got channel 3 on and, ive tried it the way on the myt56 swap thread, and questons that arent normll theard. please help i want to count my miles and get the correct speed thanks

 

Im not sure exactly how to remedy the issue, but I can tell you a few problems I see

For stock 90-92 TPI's the VSS was wired directly to the ECM, then the ECM sent a signal to the speedo

Try moving it back that way with the box in the signal side of the VSS wiring

http://www.austinthirdgen.org/mkport...F_and_vin8.jpg

 

Here is what Dakota just told me. I am in the process right now.

First, where did you pick up your switching hot lead on the fuse box?
12v power
Body ground to grd.
T56 VSS (1) lead to input on digi
T56 VSS (2) lead attach to one lead from old ECM input plug and both go into ground on Digi
Ouput (#1) from digi to other lead on ECM input plug.


Now you have to adjust the coarse/fine red/green blinking according to their instructions to come up with COARSE (3) BLINKS AND FINE (1) BLINK. That is supposed to give you the proper setting so that you can us the up/down button to bring it in exactly using gps or following car.

I was just in the process of trying to find a power lead that went on off with key.

 

thanks man i just taped in to a fused power on the fuse box. ive tried it this way already im just having trouble understanding the fine tunning let me see what i can get by reading over and over thanks man let me know if you get anywhere. also my speedo is still not counting miles?

 

I am assuming your fused power is on all the time? I'm trying to get a key regulated on/off, I may use the power window as it is close to my digi.

I agree, I had to read the instructions many times and had I not called Dakota I still would not understand the coarse/fine from the instructions.

Anyway, the key on/off makes it easier to calibrate othewise you have to disconnect power to digi on and off.

 

ok i think im pretty close as far as speed, but my odometer is not working any help?