Hello ,I have a revo about 7 months old, had temp sensor in and works fine, along with the voltage meter, i installed rpm sensor ,got it in ok ,the rpm gauge works and the speedo does also but the speedo is reading rpms ,when truck idIling at stand still it is saying that i am running about 10 miles mph which is exactly what my rpm gauge is reading. does anybody might know what i may have done wrong .THANKS FOR ANY HELP ..