My Fiat Stilo has gone into slow engin running and I do not know why. Is there a Diagnostic plug and if so Where is it. Fiat Stilo 1.4 (2004). Yours happyalan.

yes there is , there is a cubby hole were your Right knee cap should be , pull that open and you will see a fuse board , and you will see a little black plug , and there is were your obd port is