ive been running my engine in and its been fine until tonight i done about 35 miles in it and it starting misfiring and white smoke like you wouldnt believe.the problem is on cylinder 2, when i take the lead of theres no difference in the running or even when i unplug the injector, im thinking head gasket as theres water coming out the exhaust, I was wondering though if a faulty injector would cause white smoke ? the head gasket is brand new and the head was pressure tested and skimmed and i used a payen gasket and it was all torqued down correctly any info would be greatly appreciated thanks.