Right well I put it on an MOT emissions tester today and the result was: Perfect. Well within all parameters. However, symptoms are still that it stinks of fuel out the bank end, and white smoke on IDLE, black smoke on LIFT. So I am a little bit foxed. I think I will check the TYPHOON, as my wiring on the MAF extension may not be making the best connections, I might also try using a smaller gauge wire. I'll also check all the connections are tight and there is no air leak anywhere. I have noticed that the coolant is dropping slightly - could be related?