Quote:
Originally posted by JHZR2
There is a 'cigarette butt' trick that can be done to fix that tach unit (the thing that looks liek a garbage can at the left front fender). Essentially, you jam something between the lid of the the unit and the actual connections inside the unit. Makes the connections actually work, which then allows the tach to work.
I didnt bother with that, just got a new one from fastlane and havent had any problems in 2 yrs/50k.
Another option could be a dirty/bad connection in the insrument cluster. Pop it out and check.
JMH
P.S. The cigarette butt trick was one of the first things that got discussed at length when I started watchin this board, at almost its beginnings. Look way back in the archives and youll find lots of info on it.
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The first thing I fixed on my 83 was that very piece. Sitting in a rest stop in TN at 3am, tired of seeing my tach come alive then die, come alive then die. I think I used a piece of cardboard. Always inteneded to try and solder it or something, but have just left well enough alone since then.
It is called a diagnostic connector, but I can't recall why.