Ive had trouble with my speedometer. It works somewhat. It will not move till I get up around 50-60 mph then it starts to read as if im going 10-15 mph. It seems like a calibration issue but this is cable (obd0). Ive unplugged it and plugegd it back in and the same result. What do you think, bad cable, not all the way in the cluster, i dont know...