Fitting Autometer tacho

[ozeclipse]

I am looking to fit my Autometer Tacho back into my lancer. I'm now running a 4G63T from an Evo 3, so now when I go to take the signal from the coil wires (all 3), it now reads my RPM as being half of what it should be... Does anyone know whick wire I should now go with for the signal?

 

[youda]

lol, a postit note on the steering wheel that says x2