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

LT1 with no spark at coil

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Old 01-18-2006, 09:36 PM
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Default LT1 with no spark at coil

Friend of my brother has an 94 lt1 stuck at our house right now.

No spark from the coil. I see 12 volts at the coil, at the icm, but no AC voltage from PCM from opti spark signaling the coil to fire. It rained the past couple days, would you be a betting man its the opti spark or a bad ground?
Old 01-19-2006, 03:20 AM
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its the opti.
Old 01-19-2006, 04:25 AM
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Opti-spark those things go out at the drop of a dime. Mine went out on my 1994 formula 4 times.



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