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Tachometer reading incorrect RPM

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SpooledUp

Haulin Ass with Class
Joined
Apr 19, 2006
Messages
129
My tach had been reading incorrectly for some time now so I finally got a recalibrated unit from Caspers and replaced it. To my suprise it did not correct my problem. The question I have is there a way to adjust this unit that I missed when I installed it? Is there any other things that I should look for that could be causing my problem? Any info is appreciated.
 
Make sure the tach and fuel pump test leads behind alternator are not pluged into each other or anything else.....long stretch...but common.
 
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