Mallory Ignition ACCEL DFI Dual Sync Distributor 77100 - Manual (Page 2)

www.accel-ignition.com ACCEL IGNITION 2
DISTRIBUTOR PHASING
17. Position the Dual Sync Distributor so that you can see both the Red (Crank) and Blue (Cam) LEDs. Verify that the ignition
is still in the Key-On, Engine-Off position.
18. Rotate the distributor shaft / rotor in the same direction as when the engine is running (either clockwise or counterclockwise).
Continue rotating until the blue LED shuts off completely. This indicates the falling edge of the cam trigger position.
19A. If red light is still on, continue to slowly rotate the distributor shaft / rotor until the red LED shuts off, comes on again
then shuts off (Stop). This indicates the falling edge of the crank trigger position #1. Stop at this point.
19B. If red light was off after blue light shut off, slowly rotate the distributor shaft / rotor until the red LED shuts off (Stop).
This indicates the falling edge of the crank trigger position. Stop at this point. Taking care not to rotate the distributor
housing or shaft, make a mark inside the distributor housing where the rotor tip is pointing. Your distributor is now set to
Top Dead Center of cylinder #1.
20. Install the distributor and position the distributor housing so the mark inside the distributor housing, made in step 19, lines
up with the rotor tip. It may be necessary to use a screwdriver or socket wrench to rotate the oil pump drive shaft slightly,
to properly seat the distributor. Do not rotate the engine.
21. Verify that the crank LED is not lit and tighten the distributor. If the red LED is lit, repeat steps 17-20.
22. Turn the ignition key to the Off position. The key must remain in the Off position for at least 30 seconds for the programming
changes to be implemented by the ECM.
ROTOR PHASING
23. Rotate the engine backward to 22-25 degrees BTDC. Make a small mark on the outside of the distributor housing where
the rotor tip is pointing.
24. Install the distributor cap, and locate the spark plug terminal that is closest to the mark on the outside of the distributor
housing made in step 23. This is the terminal for cylinder #1. Mark the distributor cap to indicate the location of the #1
spark plug wire.
25. Remove the distributor cap, loosen the two 5/64” Allen-head screws slightly, and adjust the rotor so it is pointed at the
center of the terminal for cylinder #1. Tighten the two Allen-head screws to re-secure the rotor.
26. Install the distributor cap and spark plug wires. Double check that the spark plug wires match the firing order previously
set in the ECM. Connect the injector harness.
27. Connect the dark blue wire from Pin “H” of the 77101 harness to the points/trigger lead of the ignition enhancer module
(Example: DFI 6A DK Blue - ACCEL 300+ White Wire – Mallory 6852M White Wire – MSD 6A White Wire)
DO NOT ATTACH THE DK BLUE WIRE MARKED EST TO THE COIL!!!!!!
IF YOU ATTEMPT TO DO THAT, YOU WILL CAUSE DAMAGE TO THE ECU.
Next, connect the pink wire from Pin “A” of the 77101 harness to the switched 12 volt lead of the ignition enhancer module
(Example: DFI 6A Red/White Wire – ACCEL 300 + Small Red Wire – Mallory 6852M Small Red Wire – MSD 6A Small Red Wire).
DO NOT ATTACH ANOTHER SWITCHED 12 VOLT SUPPLY TO THE BOX.
28. Start the engine. Using a timing light, verify that the timing reading on the harmonic balancer is the same as the timing
reading in CalMap. We recommend forcing the timing in CalMap to 10-20 degrees while verifying readings. If the readings
are different, loosen the distributor and rotate the distributor housing until the timing readings on the harmonic balancer
are the same as the timing reading in CalMap. Tighten the distributor.
Your Dual Sync Distributor is now correctly mounted, phased, and ready to run Sequential Fuel Injection.
Section 2
(with distributor installed in the engine)
NOTE: Make sure that the injector harness, BLUE trigger wire going to your 6A igniton box and your ignition coil are
disconnected until you reach step 27.
1. Verify which direction the rotor / distributor shaft turns when the engine is cranking (either clockwise, or counterclockwise).
2. Rotate the engine to Top Dead Center of cylinder #1. If replacing another distributor, verify that the rotor is now pointing at
the spark plug wire for cylinder #1.