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tach is stuck at 3500 when I shut off works fine when started just replaced circuit board anyone got any ideas
You didn't say what year the car was, but you can find most the needed info on my tech site at this link http://repairs.willcoxcorvette.com/
Once you get there enter the year and search the word TACH.
You should update your profile too... so that others can look and see the year you are working with. I looked at all your previous post and I believe you have a 1978. So here is the link on the tech site to 1978 tach issues. http://repairs.willcoxcorvette.com/?yt=1978&s=tach
Willcox
Last edited by Willcox Corvette; Sep 6, 2018 at 10:40 AM.