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j
installed a new tac circuit board a few months ago. yesterday the tac started jumping up and down and then frozen, but went back to zero when i shut the car off. whats happening, and ho do i correct it?
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There is a reset that you have to do after you replace the board..lukesvette has the skinny on that..
Rich
Rich
My first parade at Carlisle 2010
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Lifetime Member
Send PMHOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
Re-zeroing the tach will not cure a bouncing issue - just aligns the start point to 0 RPM with the ignition in the run position and the engine off.... Sounds like either the tach filter or the new tach board has an issue...
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m
Lifetime Member
Send PMEquinunk, PA - USA
Joined: 10/31/2007
Posts: 2573
Vette(s): 1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.
Check for bad ground.
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j
where is the ground? off the distributor?
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in Forum: C3 Electrical, Body and Interior
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