temp guage needle all over the place

  1. #1
    just wanted to no why my tempature needle is all over the place

    Ill go out for a drive and it will go up to 3 quaters then ill stop in traffic and it will go down to a quater and sometimes it will sit bang on half way and not move for the whole journey then sometimes it will sit in the red but the light dosent come on ?

    its not overheating and ive replaced the waterpump and thermostat and flushed the system twice.

    is there a sensor i should change ?
  2. #2
    Might be a misbehaving water temp sensor, does you car run ok, no funny idling or running rough, or maybe dodgy instrument clocks or something?