erykkuld

Getting a too lean at idle fault code, something the car has had for about 8 months time, i have been slowly picking at it but i want to rip my hair out.

Things i have replaced, charcoal canister, pcv valve and spark plugs. I have closely looked at the connections around the intake, and have done some research about this code, and seems like the brake booster pipes are usually a culprit. The pipes on my audi a3 2.0tfsi are from 2004, stamped with it, but they do not have any cracks what so ever, but the pipe that goes from the little T coupling into the fuel pressure pump on the right side of the sylinder head is easy to pull out in comparison to the bottom pipe, i also noticed if i take that top pipe out, i can wiggle the connector 1mm inn/out, is that normal? I have already tossed parts at it, should i also toss some of these vacuum hoses at it? I just really need some guidance.