Re: Tach stuck
Since tachs are very delicate electronic instruments, you can not smack it with a 6 pound fine adjustment tool. You must use 16 ounce psychology.
Seriously, I had the same problem with a tach and it drove me crazy: I would smack the dash and it would change positions and maybe read for a couple of seconds but not read properly. A new replacement tach would not work either.
I had another non-related (No choke on start) electrical problem which required replacement of the switch. With a new ignition switch, the tach started working properly. Apparently, puonding on the dash would jiggle the old switch and get some function.
