MSD tach feedback issues

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#6 (permalink)

03-12-2012, 01:12 PM

Xavier

CC Member

Join Date: Nov 2006

Location: Fontana, CA

Cobra Make, Engine: Lonestar LS427, 408w, 48IDA Webers, TKO 600, 9" Currie 4-link 4.11 rear

Posts: 390

Not Ranked

Tom I have did all the trouble shooting.

Tach wiring is fine - 3 wires Ground (okay) hot (okay) tach feed (okay)
Had Autometer check out the tach (okay)
DO NOT want to take out the MSD box, a pain in the butt. Can check for 2 to 5v coming from the MSD box to the tach feed (okay) but this can actually read correctly and still be a problem because the true tool you need is an oscilloscope (don't have one).

So, no need for the lesson in trouble shooting - just wanted to know if connecting a tach to the coil while still running a MSD box will do something harmful to the tach. MSD box works otherwise.

I can try it myself to see, but did not want to burn up a good tach trying, or worse yet, something else.

Last edited by Xavier; 03-12-2012 at 01:17 PM..

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