stubarura

As the title says my bugeye wrx is misfiring... I can feel a misfire a lot of the time, sometimes on full boost but most times when my foot is only halfway down and only boosting slightly... However i previously had a code of 'misfire cylinder 1 detected' i erased the code and fitted 4 new spark plugs and a new coil on cylinder 1. Since then the problem remains and has thrown several fault codes detecting a misfire on all cylinders? As i say i can feel it more when the boost is loading up but the fault codes are only thrown up when im giving it hard... everything seems fine under the bonnet and is all serviced regular etc? Any advice wud be appreciated but i suspect i might have to take the car for a full diagnostics somewhere?