Mallory Ignition ACCEL Digital Fuel Injection Engine Management System 74030 - Manual (Page 11)

9
ACCEL/DFI
VI. CHOOSING YOUR DISTRIBUTOR
NON-COMPUTER-CONTROLLED IGNITION
If you are using a stand-alone magnetic pick-up distributor,
points distributor, etc., the Tach pick-up (1-pin brown
connector) must be used. Connect this lead to the negative
side of the coil. If the brown connector must be removed,
make sure not to remove the 39K ohm resistor which is
located 3” away from the existing connector.
NOTE: If you are using an aftermarket ignition enhancer
box (i.e. ACCEL 300+, Mallory Hyfire) the MWH’s Tach
pick-up connector MUST be connected to the enhancer
box’s Tach output signal. It is also necessary to remove the
39K ohm resistor from the Tach pick-up wire. It is located 3”
from the end of the Tach pick-up lead. DO NOT connect
this lead to the negative side of the coil if using an enhancer
box. This can result in ECM damage.
ACCEL strongly urges the use of a good quality suppression
wire such as ACCEL 300+ or ACCEL RFI Suppression
Wires. We have encountered problems (including not
suppressing electrical noise) with various ignition wires
available on the market such as helically-wound or solid
core. The use of these wires may interfere with the
operation of the ECM. Further, some high energy aftermarket
ignition units also produce electrical fields which will
interfere with the ECM’s operation. Use of these units is
strictly at the risk of the owner. Call ACCEL for
recommendations of ignition system compatibility.