help me

So I’m running 91 oct, with Judt intake and muffler delete. For some reason my car will go to 13.7 psi of boost when targeting about 13.5 then drop to 13 psi after it holds. Aeound when this happens I also get around -3 degrees of timing correction. Why would this be? And besides that does...

2012 335i N55 PWG Prod. 4/12 105k miles Hello everyone, so I'm gonna try to explain as much as I can of what I have done and potential reasoning's, I'm the only one to touch and repair anything on it since ownership so all my doings. recently did oil filter housing gasket and oil cooler gasket...

Hi. I recently bought vrsf dp fix.. I'm just installing.. my ecu does not have wire go into pin 20 and 23. And my pin 19 is white wire.. what is going on??