Mallory Ignition Mallory OFF-ROAD ELECTRONIC IGNITION CONTROL 6867M - Manual (Page 7)

7 MALLORY IGNITION www.malloryracing.com
If everything checks positive, use the
procedure below to test the ignition for
spark. Mallory also offers an Ignition Tester
(PN 28357) that allows you to check the
entire ignition system while it is installed in
the vehicle. This tool also checks operation of
RPM limits, activated switches, and shift lights.
Bypass connector
The Bypass Connector (standard ignition
bypass) fits into the mating plug of the
Ignition Control Harness to convert back to
standard ignition. This will allow the vehicle
to run on the standard ignition and bypasses
your ignition. If you use the Bypass Connector,
use ignition ballast resistors designed for the
particular distributor and coil in the wire
from the ignition switch. Use the Power Plug
to convert back to standard ignition. Also,
if you are using a Mallory Fuel Injection/
Tachometer Adapter (Part No. 29074),
disconnect it (and its diode if used) as part
of converting back to standard ignition. The
Bypass Connector (standard ignition bypass
method to convert back to standard ignition)
does not work with magnetic pickup
distributors or crank trigger ignition.
Misses and Intermittent Problems
Experience has shown that if your engine
is misfiring or hesitating at higher RPM, it is
usually not an ignition problem. Most
common causes include a coil or plug wire
failure, arcing from the cap or boot plug to
ground or spark ionization inside the cap.
Perform the following checks:
• Inspect the plug wires at the cap and
at the spark plug for a tight connection.
Visually inspect for cuts, abrasions, or
burns.
• Inspect the primary coil wire connections.
Because the Ignition Control receives a
direct 12 volt source from the battery,
there will not be any voltage at the coil
positive (+) terminal, even with the key
turned on. During cranking, or while the
engine is running, very high voltage will be
present and no test equipment should be
connected.
WARNING: Do not touch the
coil terminals during cranking or while
the engine is running.
• Make sure that the battery is fully charged
and the connections are clean and tight. If
you are not running an alternator, this is an
imperative check. If the battery voltage drops
below 10 volts during a race, the Ignition
Control output voltage will drop.
• Is the engine running lean? Inspect the
spark plugs and the entire fuel system.
• Check all wiring connections for corrosion
or damage. Remember to use proper
connections followed by soldering, then
seal the connections completely.