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Old 08-30-2007, 07:57 PM
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Curt C. Curt C. is offline
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Join Date: Nov 1999
Location: Las Vegas, NV
Cobra Make, Engine: Classic Roadster; 351W
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Sounds like it could be a bad ground. Check the ground and connections. Or, the problem with the earlier MSD box could have damaged the tach. Check your ground and then go from there.
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