I have posted this before for you ground control, you do not need a tach adapter a.k.a a tach driver. All you need to do is wire the tach correctly and splice the grey wire with a black stripe comming out of the PCM to the pickup wire for the tach. You will have a fully functioning tach that reads full rpm.

 

ok sry for the inconvinance . thanks

 

ok i found the computer and there is two sets of wires comming out of it one set goes to the fuse box with the grey wire and one set goes to the motor with a gray wire. witch one should i connect it to or does it not matter?