Need help! Bought a 55plate 1.4 sport a couple of weeks ago. Idle was very wavy and revs dropped off on acceleration almost stalling. Kept running it daily. Up to date, took air filter off to have a look at it as supposed to be K&n filter. Had a clean arounnd throttle.Put filter back on start up. Warning stop and fault of engine coolant temperature to high, temp guage shot up to maximum. Had a search around forums and couldn't find anything other than re-boot bci. Did this and second attempt it cleared (assumed it was due to messing with 'things'. started up today all warnings back including pollution warning. cleared again with re-boot. Started up again and could smell fuel faintly. All ok for about 2 miles then alll warnings bck on with what we believe to be engine light on . Idle really erratic idle and light steam coming from exhaust. Have no idea what to do next so any help would be wonderful.