Im getting the P1497 code, downstream air leak. Rough idle and no power/boost like before. 2009 Mini cooper turbo S 6speed What I have done and what is done. New timing chain/tensioner ect from dealership ( yay 3600 gone. ) New valve cover Have sprayed starting fluid all around the valve cover/clamps from turbo to throttle body, no response from motor. I cannot hear any vacuum leaks. What I did recently that brought up the issue. The tube on the water pump was cracked so i had to remove the intake manifold to replace it, when I put the manifold back on with brand new gaskets i made sure everything was clamped down and tight. Started the car and instantly started idling rough and throwing the code. Car ran perfectly for months before I did this. I searched on this forum and came across a thread where the guys injector was missing the Teflon seal, maybe this is a possible issue but wouldn't see why it would throw that code. I didn't mess with any of that. Id rather not take it to mini to get charged 260 for them to tell me it was something simple. Help!!!!