Incorrect tach reading.. - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 04-13-2008
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Incorrect tach reading..

Well so I have had this problem for about a year now and just today my tach decided to fix itself for about 1 hour and read the proper reading for my RPM's but when i turned it off and got back in after work it was back to what it used to do, which is, when i start my truck my tach shoots up to 3000 RPM's and stays there till i accelerate, where it moves ever so slightly till i gun it eventually reading the actual rpm's most likely after 5000 rpm's but then when i let off it drops back to 3000 rpm's and personally i think its a loose wire after what happened today but i just wanted to get everyone's input before i tore my dash apart.
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Old 04-13-2008
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try knocking on the gauge cluster, mine likes to not move at all but if i knock on it then it moves correctly... for a little while
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Old 04-13-2008
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tried that but to no avail i have actaully beat the guage cluster with my fist. Doesn't work lol. Btw im a 92 ranger.
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Old 04-13-2008
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I'm pretty sure there is a processor for the whole guage cluster.

IMO it's most likely within the guage itself.

Rich
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Old 04-13-2008
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It is most likely a sticking needle. Take it apart and pull the needle out a tiny bit from the face. If they are put on too far they rub.

Happens a lot when people modify their gauges like when they do overlays and so forth. But it could come that way also.
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Old 04-17-2008
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fixed my problem and got a new tach from kragen and wired it up. ill post some pics of my new setup i think you guys will like it!
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Old 04-17-2008
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That's why in my how to I made it clear, not to press them down too tightly lol
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Old 04-17-2008
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well see i have never done anything to the gauges before i have never touched them thats why i thought it was weird. But nonetheless when i get home ill post some pics.
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