MSefi.com read only forum (Jan.15,2018)

I have searched all over for a way to have MS2 run my aftermarket tach and window switch for N2O. I have a MS2 V3.0. Seen all kinds of circuits but dont know which one I need to do this. And the ones I have seen dont give very good directions on how to build the circuit. The car has a GM 3400 in it, and the stock ECM is no longer in the car. MS2 runs the entire engine. Any help would be great. Thanks.
Ray

You should probably use the stock ignition module - I'm pretty sure that has a tach output on it. Depends on what year 3400 though.

Window switch functions are easy: Just use the Spare Output Ports function and mods.

The engine is from a 00 Grand Am GT. The car its in is a 96 Cavalier. I tried the tach out on the DIS. The tach and Zex window switch both showed false readings compared to my Megatune tach which is right on target. So should I build tacho output with the relay to run these? And if I do build this circuit the only port i have available is J11. What would the port settings be to run the circuit?

Exactly what sort of aftermarket tach is this, and is it still set for the four cylinder engine a 1996 Cavalier would have left the factory with?

Its a Cyberdyne set for 6cyl. the tach and window switch both say to connect to the negative side of the coil.

You may just want to get a DIS tach adapter, like the ones from Auto Meter.