sum guy

iTrader: (4)

I just hooked up my autometer tachometer to the tach output wire. It works but it reads alot lower than the engine is actually revving. I did not cut any of the wires per the v-8 hook up. Letme know if any of you have run into this.

LS1MCSS

iTrader: (18)

If it's connected to an LS1 pcm, the signal to the tach is probably a 4 cylinder signal. That's what the factory setting is. It can be changed with programming or you can change the tach wiring.