Im wondering if lambda would affect the idling as i did have a few niggles previously and my april mot last year just made it on its emissions the co was at maximum limit so i think its maybe now with bigger injectors new chip and a faulty lambda its chucking a lot of fuel in there. As for the oil bath I'll have to take charger off again have a good inspection see whats happening where oil leak is coming from. But on a good note its sounding nice under a bit of throttle. Only 1 other thing ive done is delete isv and blanked pipe