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Spark issues, please help

LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Spark issues, please help

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Old

Mar 27, 2013 | 05:47 PM

#1

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Spark issues, please help

About to tear my hair out with this car.

Car died last fall while ideling triggering a fresh rebuild, new gm optispark, etc.

Coil had no spark.

Icm works, tested on dads suburban that uses same icm.
Wiring to icm is correct via shbox site.

Opti harness is correct via shbox site

Opti pigtail ( ord coming out of opti) passes signal through

Ran for a min this morning and tried to fire last night.

Ideas?

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Mar 27, 2013 | 05:59 PM

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the opti went bad again

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Mar 27, 2013 | 08:49 PM

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Thanks Don, very helpful.

It was the plug for the ICM. When twisted up to test it was fine, when plugged in it was bad.

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Mar 27, 2013 | 08:49 PM

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Thanks Don, very helpful.

It was the plug for the ICM. When twisted up to test it was fine, when plugged in it was bad.

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