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Pazuzu Pazuzu is online now
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Join Date: Apr 2008
Location: Houston TX
Posts: 8,700
Although, you said things don't change when the black wire is removed...
possible that you got a voltage spike somehow and you have an actual blown out tach? Internal damage?
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Mike Bradshaw

1980 911SC sunroof coupe, silver/black
Putting the sick back into sycophant!
Old 08-11-2014, 02:10 PM
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