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940 Tach Jumping

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#1

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10-05-2005, 09:59 AM

PARKTOOL

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940 Tach Jumping

Hello, anybody have an idea why my 940 tachometer jumps around. It jumps form 0 to 1,000 at idle and while driving it jumps around another 1,000 rpm. The car has 32,000 original miles (old lady driven) and the tranny is fine. Any ideas?

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#2

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10-05-2005, 06:29 PM

aleekat

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My first guess would be a wire shorting out. I don't know the wiring for the 940, but maybe be able to trace it.

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