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Discussion Starter · #1 ·
im having a problem with passing emission test don't really know what the problem is. i am failing in all categoies and am not to sure what to do next. Changed oil last week as well. i don't have any codes, scanned my car yesterday came back clean. new coilpacks as well. i was thinking of changing O2 sensors maybe cuz they havent been changed since i owned the car. any help would be appreciated. i am also suspecting it could be my exhaust.

03 jetta 1.8t wolfsburg edition
APR chip (stock,91,93,100....kept it in stock for emission test)
3" eurojet turbo back with 3" magnaflow highflow cat
cold air intake
forge inlet hose
apr diverter valve
N75 J valve
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