Thanks Rob
Wish there was a way to test it locally as its a long drive from southern highlands to Penrith or Botany then if it fails to do it all again several if there was some way of testing it here I could rectify everything step by step and see what makes it pass as it is a expensive process to Change Cat,plugs, leads, oil, Filters, clean injectors,Filter and a tune all at one time.
Anyway thanks for the advice and The Hitman in Penrith is a great plug but a golden tip!
Will take all the advice on board ad start pricing up a cat any idea on what I should pay or the cheapest place to buy?
Also willing to get others point of view aswell