hi had a few problems...new to this site ...can anyone help...my punto is a year 2000 1.2 16v sporting...when i accelerate the car judders now...it then started overheating...sorted that....it now is only firing on 2 cylinders and the idle is rough...the head gasket was replaced 7 months ago...all the works re skimmed bolts plugs belts so on....replaced the plugs again today and it is still the same..misfiring and idling roughly and when you accelerate it does not respond....cheers...any ideas