One problem to another

[Fred-R]

The picture you showed is the inlet for the BOV recirculation pipe. You're running to atmosphere without the cap on, hence the stall when pushing the clutch.

Edit: My GTR from last night.

X2!------>That's what I was talkin about....

[Nexsys]

Well im guessing that cap did the trick, just took her out for a spin and 5 mins later shes running perfectly again

[Skym]

But still venting BOV's to atmosphere which makes engine run richer, turbo's slow down when BOV's go off (less rich if BOV's are adjusted to suit, but might make a flutter sound from podfilters). Then when get back on throttle engine probably won't be as responsive (transient response). Transient hp / response makes a big difference to pickup after shifting. Reconnecting the stock recirculation piping to HKS BOV's would have been better.

Also with ECU + MAP setup you remove rubber intakepiping infront of turbo that has the recirculation port and fit intake hose joiners + intake hose clamps + hard piping + airfilter to replace it (can buy these intake kits), which I forgot to mention above.

[Nexsys]

Anyone have the stock piping for sale? I got no problem putting it on just needed atleast a temp fix for now