Hello to all, I've been running around my completed 350sx (92' 240sx with 04' 350z VQ35DE) for a while now but without a working tach and now I'd like to button that up lol.



So I've got the MSD Tach Driver box, got a good ground and switched 12v where needed, and the grey goes to my gauge, basically I'm just trying to figure out the signal input wire.



I tried using the white/blue stripe wire in/out but that did nothing but made the passenger side cylinder bank not fire, any more suggestions? I was thinking of trying the Yellow/Red. Anyone install one of these? Thanks in advance!

 

Has anyone else installed one of these? If I get time and or figure it out before I'll be sure to post up which wire it is, seems like it's nowhere to be found in the internet lol