hi guys, hope you can help as even my local Audi garage are clueless. my car , a 98 A4 1.8t has failed its mot on emissions, the problem started a few months ago i think when i booted the car in 2nd gear and noticed an immediate loss of power which steadily got worse! Audi have fitted a new g62 and MAF sensor thermostat et all (£1200) and still dont have a clue, initially I thought I'd blown the head gasket so thats been renewed too. The car runs when the maf is unplugged but kangaroo when its plugged in. The emissions are way over the legal limit, any ideas??