Ok, So Im using an MSD Dig. window switch and it's all wired up according to the TNT diragrams I have. and was wondering what the settings should be set at, right now It's as follows as I have been told Cyl: 4 RPM on: 3,100 RPM off: 6,200...not worried so much about the On and off RPMS, just the Cyl. mode. was told it needs to set to 4cyl mode but it's reading 1,800 at idle when it idles around 800-1k. (yeah it needs to be tuned) just wondering if anyone could help me out, and before the "read the manuel" input comes. I bought it slightly used ( actually used about 3 times) w/o the owners manuel.

 

i think have mine on 4 cyl but its an ls1.... but i am not sure will check in the am and get back to you where did you get the tach sig from the ecu? yours might be diff you try it on 8 cyl because its an lt its got a diff sig pulse i belive

 

yeah It's pulling the signal from the PCM

 

set it to 8 cylinder for a LT1

 

thanks Gold