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fasteddie313 fasteddie313 is offline
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Join Date: Mar 2014
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OK, I am afraid to fry something..
What MS wire(s) should I connect to the "a - To Tachomiter" on my ignition system?

VRIN+ to it?
opt+ and then ground the opt-?

Megasquirt says something about not to do this with a certain type of CDI (negative side of coil) and I'm not sure if mine is that and this tach output goes to the coil also..

Fuel pump priming is working but I'm afraid to fry my box with this tach signal..

Also, I have the innovate MTX-L.
It doesn't have what I would think of as a "sensor ground". It just has a ground for the whole thing..

Should I ground the MTX-L to the MS shared ground?
I have it just chassis grounded right now and it's working independently..

1 more thing.. Their are 2 "shared ground" white/blk wires in my MS harness. They go to different pins..
Are they the same? Go to the same place in the MS box? Use one or the other or both?
80 931S LSD-G31 Big Breaks FMIC
1 Bar so far
Old 06-13-2018, 11:37 AM
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