Msd digital ignition and stock tach syncronization
Thread Starter
2nd Gear
Joined: Oct 2013
Posts: 2
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Msd digital ignition and stock tach syncronization
I JUST INSTALLED A MSD DISTRIBUTOR, AND DIGITAL IGNITION 6AL ON MY 1982;
AND NO MATTER WHAT I CANT GET THE RPM GAUGE TO WORK. I 86'D THE FUEL INJECTION IN FAVOR OF A CARB, AND WAS ABLE TO REMOVE THE ECM AND ALL ELECTRONIC CRAP THEY PUT ON THE CAR. THE DIRECTIONS SAY USE ONE WIRE OR ANOTHER. NEITHER MAKE IT WORK. i UNDERSTAND IT SHOULD REQUIRE A SQUARE SIGNAL COMING FROM THE ORIGINAL COIL. BUT IT DOESN'T BUDGE WHEN I JUMP TO THE WIRE THAT MSD SAYS WILL EMIT A SQUARE WAVE SIGNAL. tHE LOCAL SPEED SHOP SAID I NEEDED A ADAPTER TO MAKE IT WORK. SO I PURCHASED THE PART8920 I BELIEVE. AND HOOKING IT UP EITHER WAY THEY RECOMMEND STILL NOTHING! SURELY SOMEBODY HAS GONE THROUGH THIS, PLEASE HELP!
AND NO MATTER WHAT I CANT GET THE RPM GAUGE TO WORK. I 86'D THE FUEL INJECTION IN FAVOR OF A CARB, AND WAS ABLE TO REMOVE THE ECM AND ALL ELECTRONIC CRAP THEY PUT ON THE CAR. THE DIRECTIONS SAY USE ONE WIRE OR ANOTHER. NEITHER MAKE IT WORK. i UNDERSTAND IT SHOULD REQUIRE A SQUARE SIGNAL COMING FROM THE ORIGINAL COIL. BUT IT DOESN'T BUDGE WHEN I JUMP TO THE WIRE THAT MSD SAYS WILL EMIT A SQUARE WAVE SIGNAL. tHE LOCAL SPEED SHOP SAID I NEEDED A ADAPTER TO MAKE IT WORK. SO I PURCHASED THE PART8920 I BELIEVE. AND HOOKING IT UP EITHER WAY THEY RECOMMEND STILL NOTHING! SURELY SOMEBODY HAS GONE THROUGH THIS, PLEASE HELP!
Last edited by 82MAKOSHARK; Oct 2, 2013 at 02:23 PM. Reason: NEEDED TO ADD CAR YEAR
Race Director
Joined: May 2006
Posts: 18,729
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MSD makes many tach adaptors, did you try contacting them?
http://www.summitracing.com/search/p...rder=Ascending
http://www.summitracing.com/search/p...rder=Ascending
Pro
Joined: Oct 2009
Posts: 523
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From: Calgary Alberta
I JUST INSTALLED A MSD DISTRIBUTOR, AND DIGITAL IGNITION 6AL ON MY 1982;
AND NO MATTER WHAT I CANT GET THE RPM GAUGE TO WORK. I 86'D THE FUEL INJECTION IN FAVOR OF A CARB, AND WAS ABLE TO REMOVE THE ECM AND ALL ELECTRONIC CRAP THEY PUT ON THE CAR. THE DIRECTIONS SAY USE ONE WIRE OR ANOTHER. NEITHER MAKE IT WORK. i UNDERSTAND IT SHOULD REQUIRE A SQUARE SIGNAL COMING FROM THE ORIGINAL COIL. BUT IT DOESN'T BUDGE WHEN I JUMP TO THE WIRE THAT MSD SAYS WILL EMIT A SQUARE WAVE SIGNAL. tHE LOCAL SPEED SHOP SAID I NEEDED A ADAPTER TO MAKE IT WORK. SO I PURCHASED THE PART8920 I BELIEVE. AND HOOKING IT UP EITHER WAY THEY RECOMMEND STILL NOTHING! SURELY SOMEBODY HAS GONE THROUGH THIS, PLEASE HELP!
AND NO MATTER WHAT I CANT GET THE RPM GAUGE TO WORK. I 86'D THE FUEL INJECTION IN FAVOR OF A CARB, AND WAS ABLE TO REMOVE THE ECM AND ALL ELECTRONIC CRAP THEY PUT ON THE CAR. THE DIRECTIONS SAY USE ONE WIRE OR ANOTHER. NEITHER MAKE IT WORK. i UNDERSTAND IT SHOULD REQUIRE A SQUARE SIGNAL COMING FROM THE ORIGINAL COIL. BUT IT DOESN'T BUDGE WHEN I JUMP TO THE WIRE THAT MSD SAYS WILL EMIT A SQUARE WAVE SIGNAL. tHE LOCAL SPEED SHOP SAID I NEEDED A ADAPTER TO MAKE IT WORK. SO I PURCHASED THE PART8920 I BELIEVE. AND HOOKING IT UP EITHER WAY THEY RECOMMEND STILL NOTHING! SURELY SOMEBODY HAS GONE THROUGH THIS, PLEASE HELP!
I know in some of our cars you need to bypass the in-line tach filter to make it work.
But that should only be the case in the older C3's (pre-HEI).
The gray wire from the MSD 6AL should be connected to the tach wire that was originally connected to HEI distributor.
Hope that helps. If you need the color of the original tach wire then let me know and I will check it out.
