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DUK DUK is offline
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Join Date: May 2005
Location: Cridersville, OH
Posts: 1,879
Tach bouncing, not VR or springs?

My tach bounces horribly when accelerating and decelerating. This is in my '75 w/ 3.2 and megasquirt. I've datalogged the voltage and there are no spikes. I just tore apart the tach and the springs are intact. Do you think they have weakened?

Are there replacement springs or a way to "dampen" the needle more? I've also had a problem with the tach not working when it's hot out. It will not work at all when first starting but starts to work little by little as I drive.

So what's up with that?

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Old 06-13-2010, 03:56 PM
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