Today whilst driving I noticed my fuel and temp gauge were acting weird. I knew I had half a tank of fuel but whilst driving on a flat it suddenly went up to over 3/4 tank. I then saw that my temp gauge had shot up to just under Hot. Literally as soon as I saw it it dropped back to its usual halfway mark. The fuel then dropped back to just under half tank which would be right for the distance I had driven. They both continued to do this for the 20min drive home. 29 degree day. No idle issues and drove as normal other than that. It's never done it before. What should I be checking for. 12mths ago she had new fuel lines and fuel pump and 5mths ago new O2 sensors. She's my daily drive.
