Jerry,
I concur with adding a ground wire/cleaning/tightening the orig. wire.
Best grounds go straight to the batt ground terminal.-Bob
Originally Posted by SmokinS13SR20
My buddys car also did this but with the stock tach. It turned out we added the ground going from the transmission to the body under the battery bracket. We also had the lights diming down at certain rpms and the stereo wouldn't work and the cigarettte lighter accessory plug wouldn't work.
