Tachometers for dummies!

cannucky said

I just bought a Tach for my Rallye dash and the instructions state that "these Tachs zero out when power is applied " so I guess I\ll be seeing the same sort of thing when I shut the key off , Oh well as long as it works when the engine is running is all I care about

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same here, all cared about is if it worked while the engine is running, which it did...for a while, then it started reading 1500 in gear and then only went up from there, it was actually kind of amusing for a while, then it got irritating , then it quit LOL. i found a Westberg tach at pull n pay that had seen the elements, looked it up on their website, turns out it was 140.00 new, blew the dirt off it and hooked it up, works perfect !