Thats the funny part though...I had it hooked up to the tach output on the MSD and I have had 0 issues with the proform and now the Autometer one I have.
I double checked my connections...they all seem good. I have the green "trigger" wire from the shiftlight ran back to right where the (-) terminal is on the coil....all new wiring from when I had my proform, also my mallory box died on me so im running stock ignition......Also new coil since then, im running a mallory, and new coil connector.
What gets me is that it only does this quick flashing when the car is under a bit of load.....cruising it stays off, but if im in 3rd,4th,5th and accelerate 10 or so mph and the car lugs a bit it goes off.... and its only 1/2 brightness...it flashes to the rpm of the engine!
So yeah, crazy! The only other thing I can think of is possible a arcing plug wire on the engine....but why only under load?!