does anybody else on here have problems getting there cars through and emmisions test,im only runnig greens so not a massive speck but car failed yesterday on emmisions test and now i havent a clue on how to get it through i pulled dump valve pipe of to try weakening it up but no joy.how do you all get on with this problem

 

there are only 2 ways, either fit a cat or find a "friendly" examiner