[Power Surge]

Originally Posted by kris-kincaid

John,

You need to make up a new wire going from the male spade tach output on the MSD box directly to the tachometer. The green wire should be dead and not connected to the coil or the tach or the MSD box.

This is totally optional, but I usually hook up the black wire on the MSD box that normally is connected to the coil to the green wire running from the tach to the coil. This eliminates running extra wires through the firewall.

This should work, if not we'll try something else.

Kris, you say "directly to the tachometer" but then you say not to use the green wire? Which wire does the tach input get attached too?

I am following this closely, as I have had some odd tach issues with my Vegas CSX with the SAI gauges. I have a VERY hard time getting a tach signal on the dyno. My garage door opener also won't work if my car is running, I have to shut it off. I'm pretty sure my tach is connected using the green wire.