reset ecu by diconscting batt for 15 mins should run ok till you turn off or stall as that is when imbliser cuts in normal (fault code reader will say alsorts like ecu voltage low ansd ecu locked etc) ps you will need a vw computer to recode ecu(had mine done for £35at vw)they will need car)
Next day I was at the Scottish meet, and she was running v bad! chuffed out black smoke and ran on 4 for ages, spat out flames etc.. cat may fooked after all that over fueling
take it to vw as their computer is best at finding probs had a prob with mine and my code reader couldnt sort it ,but vw one did it in half an hour only 35 quid