Now it won't let me upload video

No mate bought a o2 sensor but the rest I tried of my mates 1 all known working gd it's only a slight stutter won't let me upload video to show

It's not really like a misfire is there anyway I can post a vid also surely if ringland it would do it still with o2 disconnected also it's on 119k but dunno if engine ever been changed ect

I’m not sure on the age of your car , i had a boost solenoid that was dirty , gave it a clean and no change , as above did a reset and problem solved , i did the disconnect battery pump the brake pedal about 30 times left battery connection off for about 30 mins then job done , are you showing any cels ? it could be as simple as maf and even if you swapped it and no reset then problem still exists , i am thinking at that mileage fuel pump could be going south , turbo boost is around 2500 upwards so not getting enough fuel , it does leave a risk of det as was happening with mine on a much lesser scale as engine was running lean due to pump not supplying enough , a cheap code reader may help only 15£ or so on flea bay won’t read all issues due to subaru using other software than most

got a code reader no codes show up also it's fine if o2 disconnected and is fine above 2.5/3k only does it when not on Boost at low revs and full throttle any1 know how I can upload video

not sure how to upload a video , maf and fuel pump won’t show a fault if they are not working properly , if you are getting full boost plus not using oil then let’s assume positive that engine is ok, disconnecting the 02 may just be covering up the fault rather than the issue , it’s not easy to answer but i’m still thinking swap maf and try a reset my second option is fuel pump as it’s the only thing you have not changed lol , if it’s under fueling pump will compensate as it did on mine , i did not know i had an issue as when it did det pump put more fuel in , it was lucky i was running engine in so not pushing very hard any way