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Thread: Tach issues
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08-10-2021 #1
Tach issues
HI I have an LS3 PSI harness and an auto-meter electronic tach. The tach is a special addition 2006 Gm Performance parts issue that I need to keep.
I mention this because tachs pre 2007 are known to have a problem with low voltage signals.
Tach is inoperative but is fine on a bench test. Found lots of info about using a step up resistor inline. Then found so much conflicting info.. Mus use 12v.. not must use 5V... must use 1Kohm.. no us 5K ohm. that I got really worried.
So I went out and bought autometer 5117 https://www.autometer.com/tach-adapt...E&gclsrc=aw.ds
question has used this tach adapter? Instructions say tap into each coil bank.. which I am not doing..
I want to use the tach signal (white wire) out of PSI harness
Alternatively If someone could set me straight on the step up resistor that would be helpful as wellFrom a place you will not see comes a sound you will not hear....
67 Camaro In progress
https://www.pro-touring.com/showthre...-Tap-67-camaro