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SUs, Pertronix, and Stumbling 1978

posted by  Chris Mullet on  Fri May 15 13:09 CST 2020
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last visit: Fri Oct 24 09:08 CST 2014
[RELATED]

A properly working ignition system will show as a nice rhythmic series of flashes - approximately 6 flashes per second if the pickup is connected to any one of the four plug wires. What you're looking for are any breaks in that nice rhythmic flashing, like the strobe light won't flash for a split second. Check all 4 cylinders separately as the problem, if it is an ignition issue, might only be affecting one or two cylinders.

You can also connect the pickup to the coil-to-distributor hot lead and you will then be watching for a break in an approximately 24 flashes per second.






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