Tach wire

[sadc]

Im trying to setup my Viper 5701 alarm/remote start. And It says that I need to get one of my alarm wires and connect it to a rpm wire in my car. Ive looked it some places of where it could be. And as of right now I have to place. I just want to know which is better. I have
Tach Black/Blue Or Blue/Black Coil Pack 2 Cylinder Setting

Or on the PCM behind the center counsol. Pin 58 white wire?


which is better

 

[sadc]

idk if i need a tach filter with it?

 

[steve]

I'd use pin 58. It's the output from the power transistor tach gate.