I just bought this 98 1.8t and cant get it to pass emissions. Dont know too much bout audis and the guy i bought it from skiped titles so did never get it plated or drive it even so knows nothing bout it. I know its got a garrett t3t4 but dont know the model wich sucks cuz it needs a rebuild. It has a bov unknowen make and has a big ass front mount and 3 inch turbo back exhaust. I just had a custom intake built cuz it was leakin boost from hell with the ghetto setup the guy had on it and had the cat reinstalled for emissions. I failed on co,s and hc. I read about a spark plug fauler mod for the o2 sensor? I was goin to try this and throw some e85 in it to run emissions. Does anybody know the correct ratio? It sucks cuz i really know nothing bout the aftermarket on this car and am hoping later if i get some pics that u all might be able to help me identify some things? But first the emissions is my main concern.. thanks ahead for some advice.