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-   -   Bouncing Tach (http://forums.pelicanparts.com/porsche-911-technical-forum/622830-bouncing-tach.html)

TJK 08-03-2011 07:02 PM
Bouncing Tach
 
I have a 1982 SC and the tach has started bouncing. Previous posts suggest voltage regulator or loose connections. What puzzles me for an electrical issue is that it only starts after 10-20 min of driving, and stops immediately upon idle. Does this fit with a dying voltage regulator? No other symptoms. How do I diagnose this given it is intermittent?
Thanks for any advice.

daepp 08-03-2011 07:11 PM
Do you still have points. When mine started to go bad the tach went nutz. New points solved it.

Joe Bob 08-03-2011 07:11 PM
RPMs increase voltage. A VR regulates it.....

Throw a meter on it....anything is guess work.


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