Hi all. i know this has been covered a few times, my fuel gauge when i bought my 2003 2.8jtd ducato van was on half full. which i thought was a resort , drove home and drove around all weekend on the half a tank, which remained half a tank, The alarm bells went off at this point. filled it up and it read empty. after using nearly al the fuel ( using tripmeter) it went to full. which is were is still is at. i couldn't locate the little white box under the glove box which is supposed to hold some electrics which might need resoldering. I haven't tried the disconnect the battery trick as yet. any help or ideas will be gladly welcome. New to fiat and this site. Many thanks. Mark