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.

 

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

 

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.

 

I'm pretty sure there is a processor for the whole guage cluster.

IMO it's most likely within the guage itself.

Rich

 

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.

 

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!

 

That's why in my how to I made it clear, not to press them down too tightly lol

 

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.