Installation Procedure for Programmable Distributors
1) Before removing the old distributor from the car, check which direction the rotor is moving. (CW) or counterclockwise (CCW) seen from the top. (put that on a little note, together with the proper ignition sequence).
2) Now bring the engine to the TDC, at the end of the compression-stroke, for cylinder number 1.
(the rotor on the old distributor should point to the cable that connects to the sparkplug of cylinder number 1)
3) Now put your 123\TUNE in the car (Note: wherever the 123 rotor is pointing now is your new #1) and find a position where the cables and the vacuum-nipple come out conveniently.
4) Connect the wires (Red, Blue etc) according to the proper diagram, but do not connect the black wire yet.
5) Turn on the ignition. If your rotor rotates CW: rotate the unit CCW until the green LED just lights up. (also press the rotor in a CCW direction, to remove any free play in the drive) If your rotor rotates CCW: rotate the unit CW until the green LED just lights up. (also press the rotor in a CW direction, to remove any free play in the drive) (The LED shines through one of the holes in the aluminum disc below the rotor) For all models: if you expect a bad ground connection: use the M5-threaded hole in the bottom-face of the housing, for a direct wire to ground. Turn off the ignition.
6) Now, connect the black wire to the coil according to the schematic. Connect the spark plug leads in the proper sequence to the cap, starting with the wire for the number one cylinder at the position pointed to by the rotor of the ‘123’. Also connect the high voltage wire from the coil to the center position of the cap. Attach the cap to the distributor.
7) Route all wires well away from the high voltage leads and away from moving parts, using tie-wraps or other suitable means. Connect the vacuum-tube (if there is one) from the carburetor to the nipple on the ‘123’. Older engines may have a screw-connection for the vacuum-advance diaphragm. In this case you can use a short length of rubber hose to connect to the 123, or remove the hard line to the carburetor and replace it completely with thick- walled rubber vacuum-hose. If you programmed the proper advance-curve, you can now start your engine!
8) Always! Always! synchronize the app on your phone with the motor using a timing light.
Here are a couple ways to help you sync the app with the motor.
1) Set a program in your app to 20* across all rpm's. Start the motor and verify that you have 20* at the crank. If you do not simply loosen the distributor and adjust it until you do. Once you have 20* at the crank, tighten the distributor down. The app is now synchronized with the motor and you can now confidently add a program of your choice and know that it is accurate.
2) Pick any point along the curve and verify with a timing light that the point on the app is the same at the crank. If not loosen the distributor and adjust it until you do. Then tighten down the distributor.