Quote Originally Posted by green91
Tachometers count pulses, resisting the line won't do you much good. What you would need is a way to reduce the amount of pulses by 1/3
Yes I know how tachometers work.
what i did was replace the "gain" resistor with a variable resistor.. this controls sweep. I know this is correct because I am able to control the sweep of the needle by adjusting the resistor. I have done this in the running car. Thing is it takes a while to get it fine tunned and keeping a steady RPM is hard and the fumes can get bad.


Now right now I have my computer acting as sort of a function generator. Using a sound tone program I can output a wave through my computer to my stereo system to act as an amplifier for the signal. And I can then output that signal to the tachometer. And I can exactly control my tachometer from my computer screen by sending different freqencies.

Now I just need something to act as a rectifer to only send the + pulses. I have an old tachometer that reads both + and - sides of the wave and it works flawlessly with my computer setup.


So yes you can control amount of pulses, but that is much hard to do... to trick the V6 components to send a I4 like signal. Or you can let the tachometer accept the V6 signal and adjust the "gain" resistor to make it as if it came from the factory that way.