I keep having this reacuring problem with my car. I keep throwing a PO147 and PO141. I think those are the corrext codes. BUt i know for sure its a lean code in bank two. Its acting weird it will go out for a day or so and come right back on. Or ill clear it everything will set fine then the code will come back. All i have done to the car is a spec clutch and flywheel and a aem cai. Any ideas whats going on?