Tach reading off - Mustang Evolution

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Old 03-06-2013, 02:47 PM   #1
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Tach reading off

The tach on my 06' GT reads 0 when I'm at idle but moves up as it should as I drive it just always reads about 780 low (where idle is). Has anyone else had this problem or know what it could be? And if you have or do how did you fix it? Thanks!
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Old 03-06-2013, 02:57 PM   #2
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You could try unhooking the battery for a few minutes and see if it fixes it. It's probably a stepper motor. They are used on the instrument cluster and go bad. I believe you can find them on ebay for less than $20. Not sure how much of a pain to replace, but I don't think it's too bad. If the battery thing doesnt fix it, search the forums for stepper motor and you should find some info on how to do it and how much.
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Old 03-06-2013, 05:43 PM   #3
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If they are incorrect you have a few options. Take the cover off the gauge pod and adjust it little by little using the diagnostic option on your handheld tuner. This takes many starts and shut offs to get perfect, but don't take it completely out and adjust it because it will reset when you plug it in. If that doesn't do it you can replace the stepper motors by ordering some from amazon and soldering them in yourself.
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