MSD 62153 DIS-4 Plus High Output Installation - Manual (Page 14)

14 INSTALLATION INSTRUCTIONS
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• W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
TROUBLESHOOTING
Every MSD Digital DIS Ignition undergoes numerous quality control checks including a four hour
burn-in test. If you experience a problem with your MSD, our research has shown that the majority of
problems are due to improper installation or poor connections.
The Troubleshooting section has several checks and tests you can perform to ensure proper installation
and operation of the MSD. If you have any questions concerning your MSD, call our Customer Service
Department at (915) 855-7123, Monday - Friday, 7am to 6pm mountain time.
MISSES AND INTERMITTENT PROBLEMS
Generally, a miss or hesitation at higher rpm is usually not caused by the ignition. Most probable causes
include a coil or plug wire failure, arcing from the plug boot to ground. Several areas to inspect are:
• Always inspect the plug wires at the coil and at the plug for a tight connection and visually inspect
for cuts, abrasions or burns.
• Inspect the positive (+) and negative (-) coil terminal/wire connections. Because the MSD is a
Capacitive Discharge ignition and it receives a direct 12 volt source directly from the battery, there
will not be voltage at the coil positive (+) terminal with the key turned On. During cranking or
while the engine is running, very high voltage will be present at the coil. Do not connect any test
equipment to the coil positive (+) or negative (-) terminals/wires.
WARNING: Do not touch the coil terminals during cranking or while the engine is running.
Figure 14 MSD DIS-2 IGNITION WITH IGNITION ADAPTER, PN 8912