Negative LTFT at Idle, Rich AFR at WOT

If you had a leak pre turbo-post maf, trims would be positive as it's taking in unmetered air. negative trims mean the car is losing air. that wouldn't happen until after the compressor. So check both tmic couplers and the tmic to

 

Totally agree with you. None of the fixed leaks from yesterday had any effect.

When I was doing my boost leak test, I had removed the TMIC so that I could set up my tester on the throttle body and check for leaks around the PCV area and intake manifold. I couldn't detect any audible leaks or visually with snoop (where I could access).

However, the air was leaking internally and I could feel it coming out of the oil cap. Is this normal?

 

A Intake valve was open, then rings are letting pressure into block. You would have to remove valve cover and turn intake cam to visualize all are closed. Honestly i think you may have only a very small spot in which all 4 cylinders intake valves are closed.

 

^^^ That goes out the window with aftermarket cams.