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Tach problems

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Old Jan 17, 2013 | 06:41 AM
  #1  
1bad1's Avatar
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Joined: Nov 2012
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From: Cookeville ,Tn
Tach problems

1991 rs factory tach , when I turn the key on it goes to zero but when I start turning the car over it jumps up to 4and 5 thousand and then Pegs out and stays there even when I turn the car off but when I turn the key back on it goes to zero , any ideas on what to check or do ? Thanks
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Old Jan 17, 2013 | 06:57 AM
  #2  
vetteoz's Avatar
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Joined: Apr 2005
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Tach problems

https://www.thirdgen.org/forums/elec...meter-fix.html
https://www.thirdgen.org/forums/elec...ach-reads.html
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