Instructions are here;
https://123ignitionusa.com/content/123_tune_manual__94319.pdf
You should load the curve into the distributor with it disconnected prior to installation. However if you didn’t you can still do it, just disconnect everything and follow the instructions by plugging in the usb cable and load the curve from your computer.
Then.
It doesn’t matter where the distributor is lined up initially, you just put it in loose, where you will have the best access to the USB port and the wires have the best clearance.
Connect everything except the black wire.
Turn the ignition on and then rotate the distributor opposite of the direction it rotates when running until you see the Led light shine through the aluminum disc. Stop and tighten the distributor.
Then connect all the ignition wires and cap. It should start.
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78’ SC 911 Targa - 3.2SS, PMO 46, M&K 2/2 1 5/8” HEADERS, 123 DIST, PORTERFIELD R4-S PADS, KR75 CAMS, REBEL RACING BUSHINGS, KONI CLASSICS
Last edited by snbush67; 12-22-2021 at 07:05 PM..
Reason: Removed some information that could cause some confusion.
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