Flatlander
Senior Member
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I am trying to troubleshoot problems with the tachometer on my 77 Spitfire. My old tach was not working then finally I got it to work somewhat. It would seem to work properly during idle, registering 1100 rpm. When the gas pedal is pressed the needle would drop to 0 and remain there until the gas pedal is releasded and the engine returns to idle at which time the tach returns to 1100 rpm. I have tried using another tach out of a parts car with the same result. (I also thought about buying a cheap tach from Harbor Freight in order to rule out the tach.)
My thoughts are that either both tachs are bad and need to be rebuilt or there is something wrong with the voltage stabilizer. Any ideas? I have pulled the tach out of the dash and direct wired to the battery ground, power in dash and negative lead on the coil in order to rule out bad connections. Any way to check the working of the voltage stabilizer with a volt meter?
Thanks,
Gary
My thoughts are that either both tachs are bad and need to be rebuilt or there is something wrong with the voltage stabilizer. Any ideas? I have pulled the tach out of the dash and direct wired to the battery ground, power in dash and negative lead on the coil in order to rule out bad connections. Any way to check the working of the voltage stabilizer with a volt meter?
Thanks,
Gary