ok ive been to ford this morning, they plugged it into the computer and the only codes that come up were battery ones (I think cause I put a new one in last week) apart from that he couldnt see anything unusual. he brought up alot of engine sensors, took it for a drive and he said every seemed fine, he also brought up the wastegate sensor and that was ok, opening and closing when it should and holding pressure so its not leaking. he reset all the sensors and said see how it goes, I'll just have to keep an eye on it to see if it gets worse.