Speedo works.
Wired in to pin A32 eehack shows right
Got error code 97 because there no speedo on wire.
uncheck Vss Signal Diagnostic (Error 97) i tuner pro and flash ccm.

The eehack show the speed.
But not speedo gauge.
I dont think its going to work tryed different calculation.
Need to wired me to vvs signal from vss sensor its yellow on pin A32 ??

Its a 350 lt1 from corvette c4 1994 and pcm 16181333.
I installed it in my el camino ss 1970 for 10 years ago.
Bought aftermarket tacho and speedo (china:innocent2:) , the old was from a van ....

The pcm pinout show 4000 ppm on 2 chart i looked at.
So pcm strecthes or shorts the pulse to match speedo ?

Trying to understand the 4000 ppm output.
Does the ecm send 4000 ppm to speedo when you change values after tire change or change output ppm to example 4030 ppm ?