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Hi all!

need some major help with my skyline, renctly wound the boost up to 1.3 bar for a track day,

long story short blew exuast manifold gasket, put a new one in took it for a drive and the car hesitates to boost, at about .3 bar it feels like it hits a wall. looses all power until you take foot off the throttle and it will come back to life.

Ive changed;

Spark plugs and gaped to .8

new coil packs

AFM

checked;

sensors

boost leaks- none that i could find with carby cleaner

Also tried re setting the ECU

Can any body throw some suggestions my way??

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https://www.sau.com.au/forums/topic/415844-rb25det-fuel-cut/
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well the guy that advice me to do that organises all the drift meets here, forgot to mentioned i thort i might have blown the turbo so i took it out and checked it but it seems to be fine and ive also put another standard turbo on just to eliminate that possability,

ive wound it back down to standard psi, now its running rich on idle and when it starts boosting feel like you hit a wall

ive searched RnR but not convinced that its that..

anither thing is when it starts boosting (before it hits the wall) it soulds like the psi coming out some where from the left hand side, sounds odd and its hard to explaind but ive looked at thres for the last couple of months tryi to diagnose this problem

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