TonyArmstrong

Hi im looking for advice i have an issue with my car. It was misfiring & juddering. Epc & eml lights on. so plugged it in. Came up piston 3 coil pack so u changed all 4 ignition coils & sparkplugs ran amazing for a day even when hot now its started to do the same thing but its constant now. Not just when it's hot any advise could be greatful thanks