Hi rich, regards to fuel pressure , i carn't see on vcds that it measures this in live data, I think i managed to connect a fuel pressure gauge and the pressure was erratic and when it dropped it ran bad and cut out when the pump stopped, was quite a long time ago. The other thing ive read about in the past is an ecu issue which causes lumpy running when cold but that was on the golf 130hp pd.Also to check the timing its best to drop the front end. i normally just loosen it off and pull everything forward. And another thing ive come across recently is a split turbo hose causing hesitations, loss of power and smoke.