My Rb20 Gets Possitive Pressure When Rev With No Load

[robots]

Hey!

My engine is not performing as it used to recently. Lumpy idle, fuel smell(running rich), acceleration is dull.

My greddy profec b spec 2 reads -45/-50 kpa at Idle. I don't think its right. Should be more vacuum there, right?

Also, when I rev it with no load(car parked). I can see it gets to 0.2+ kpa with no load !

I thought normally, it shouldn't produce any positive pressure with no load.

I got front facing plenum, all steel intercooller piping, turbo>afm pipe is also steel. Stock air box, factory panel filter, no bov. Just removed it.

It was all good to drive before, but now it seams like its got some air leaks.

Also I had no load positive pressure ever since I've done front facing plenum, and got rid of factory bov.

Any ideas where too look for ?