enix187 Posted February 5, 2010 Share Posted February 5, 2010 I have an 83 280 zx 2+2 with the digital dash, lately the speedo fluxtuates widely and then just goes to zero. It seems to progress normally until 22-28 mph, then it will go between 12 and 28 until going to zero. I don't know where to look for anything to adjust. The po had had a fun time playing with wires under the dash, that could be it, but the speedo used to keep up with the car, only going up and down 2-4 mph off of what i was going. Quote Link to comment Share on other sites More sharing options...
roger.svoboda Posted February 5, 2010 Share Posted February 5, 2010 Be sure it is tight into the tranny. Check the connection between the short cable in the dash and long one to the tranny. Be sure it is securely screwed into the speedo. Quote Link to comment Share on other sites More sharing options...
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