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Tachometer fluctuates at WOT on my 88' Iroc-Z???

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Old May 6, 2002 | 07:53 AM
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JDIroc
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From: PA
Tachometer fluctuates at WOT on my 88' Iroc-Z???
I have MSD wires w.stock ignition and coil but the tachometer fluctuates at wot especially at the track on firday night. Is it the MSD wird sending a signal through the tach and messing it up like too muck resitance???
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Old May 7, 2002 | 08:56 AM
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JDIroc
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From: PA
Anyone? Do i need an MSD filter
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