hi guys,
does anyone know why my car (automatic) sometime idle at 1800rpm and sometime idle at normal 700rpm. It does not flutuate up and down, all the time, instead starting at normal rpm and after a while it then start to idle high and remain at high rpm. Sometime i switch off the engine and restart it seem to come back to normal and then soemtime start all over again.
any help would be very much appreciated.