Overboosting...(RB25DET)

[BASHERnissan]

I figured out why my car was "misfiring"... my r33 gtst was playing up when any throttle or boost was applied, misfiring". So I hooked up my laptop to my link g4 ECU and ran a data log and found out on that log I had been boosting over 26psi !!!! it was tuned on 15psi and made 320hp to the wheels and one day started doing this weird fuel cut or ignition cut thing. SURELY this has something to do with it, but I cant find any fault codes or anything been thrown up when im hooked up to the ECU. The only thing is a couple time a RPM limit popped up but i was no where near the 7500 redline. ???? I have no clue with this tuning stuff so any ideas ?? I also blocked off my boost controller to the wastegate and still did the same thing as before but didnt run a data log to see what was up. I will attach the data log to this. (9:51 mins is where I boost spike the most)

 

Thanks for all your help.

Log 2019-06-1 2;08;29 pm.llg

[GTSBoy]

If it is overboosting with the wastegate fed direct from the boost source, then the wastegate is clearly not doing its job. Stuck, jammed, frozen, etc.