[Whizbang]

So i got the FB running, and for the sake of seeing my RPMs i decided to run an Autometer tach. Simple wiring seeing i wired the MS up without issues. One switched 12v, 1 ground and 1 tach signal wire. Nothing special. Ran the tach signal from the Neg on the trailing coil. Have it set to 4 cyclinder.

The first tach worked fine for a few minutes. Put the ign forward, it saw power, set itself down to "0" then when i cranked it registered. Fired it up read properly. Then it became out of whack, then it stopped moving and then it did nothing. Thought it was in the wiring. Check everying, and its normal. Returned the tach to Summit (live close by). Got another.

Installed it. DID THE EXACT same thing. SO. I am stumped. Really have NO idea what could be causing this. I am going to run wires from all new sources for the next tach and hope summit will take this one back too.