Hey all hoping someone could help with this problem that just started. When I drive the car at around 50-60km just cruizing min boost it will start to surge. Now when I thump it off the line it will surge onto boost feel like no power then hammer off again sometimes it will surge and sometimes it wont very intermititend. Change fuel filter, boost solinoid matenence, cleaned the throtle body and still no good. Any ideas or help would be much appricated as ford want $300 just to plug into computer...