hey sorry if this has been posted before but ive been having problems with my 04 reg 1.2 16v clio. it began misfiring so i changed the spark plugs and coil pack. this was last night and ran perfectly, and today nine times out of ten the engine fails to start. it turns over just doesnt fire. on the odd occasion it will start up but cuts out straight away and then the emmisions and electrical fault lights come up. any help will be much appreciated.