ok did some more investigationz... pretty sure its a air leak coming from the manifold on the right hand side (just the red intake manifold and not TGV housing). As I took it off to fit the autronic IAT sensor.
I re-used the gaskets but i can hear it sputtering from the drivers side.
Think i'l take it out again and put new gaskets.

makes sense coz when the motor heats up, the problem almost goes away (expanding metal).

running stock STi inj. dont plan on using decaps when i get it tuned. i'l push the 550's as much as it can go.