After going all summer long w/o a working tach I finally got a new one. The old one would kick to about 4K rpm and stick there once in a blue moon, 99.9% of the time it did nothing. Well the new one doesn't work either. I've tested all the wires w/a light meter- it's getting power to the + and "S" wire. I'm stumped. The new tach has a bunch of little switches, they're all in the up position. Any suggestions? 1987 PCM 351 and it's running great. The new tach is on the bottom.
(Message edited by Parkcityxj on September 09, 2004)
Linear Mode
