Hi I have a problem with my Z where the speedo will just randomly flick to past 180km/h and stay there. Also my power steering is very hard. I have been doing a search on the forums and people have said either could either be an earth wire behind the dash or my speed sensor in the gearbox. Since my speedo still works some of the time is it likely the speed sensor is just dirty? Also sometimes when the speedo is working the transmission will feel really smooth but mostly its quite rough - Not sure what thats about Finally I have this random black (maybe earth) wire hanging out underneath my glovebox - its not the speaker wire as far as i can tell because all speakers work. Any answers MUCH appreciated. Thanks!
