Hi guys, dragged the inlet manifold of and emptied a can of oven cleaner into it , then pressure washed it out and had a look, Then I went for the big guns, a kilo of caustic soda flakes followed by a kettle of boiling water and left it overnight, then another pressure wash. It would be interesting to know how much weight I removed but I did not weigh it before i cleaned it. Replaced the vacuum lines other than the ones that go to the engine mounts. Fitted the new turbo boost control solenoid and put it all back together. Erased the fault codes with Carly and all is fine no EML. the only fault I am left with is the air con one and I have a used AUC sensor coming from ebay. Fingers crossed that will cure the last fault code. Thanks to all who offered advice. Paneuro.