Mine does EXACTLY the same thing. I have posted on it before with no replies. Will be interested to see if you find anything. I'm thinking about a gauge pod soon with some other gauges and a tach--but we're in the middle of a move, so that may be along way off.
when the tach goes to 4000 is the engine revving that high? because if it is just the tach i would try a new one. its just a guess. i'll ask my friend and see if he has any ideas. don't know if i helped. but i always try. brandon.
Supposively the magnet goes bad in the stock tach. Mine stays at 3000rpm. Sometimes it will go back to normal. I just went ahead and installed and auto meter tach with shift light. Its more accurate anyways. Also like I said, mine sits at 3000rpm. When it finally starts too move and hits 4000rpm, I'm really at 3000rpm according to my auto meter tach. I hope this helps a lil.
Hey guys sorry for not responding back my computer took a dump.
I havent check anything out yet but i think im just going to get aftermarket tachs. I appreciate you all's feedback. Thanks again for you time and experiences
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