feul or air cut at high rmp's

[armevo4]

Hello guys. I have a problem need your help . I bought a evo 4 gsr a while back . I had a lot of problem so fixed them one by one .now im having feul cut at high rmp's Icant figure out why . Ive changed the wastegate , injector ,feul tank , fuel filters, spark plags, air filter . It fixed the problems one by one .everything was working awsome till this morning . The feul cut problem at high rmp's.the turbo boosts is ok mine was 0.8bar and till the cut is 0.8 bar .today I rechecked the spark plugs and feul tank . Till next morning im gonna check the injectors if there is somethings in the filters blocking it .

Anything else if you can tell me to check will be great .
Thanks you
Ps I live in a country where non of the mechanics worked with this kind of cars so Im trying to do everything myself .

 

[Andy6]

Do you have standard parts on it? Can you get it mapped anywhere? I doubt it is something blocking injectors etc otherwise it would effect the whole rev range

 

[armevo4]

Everything I have is stock . If you mean by standard items. Mapped you mean diagnosis the computer?. I noticed something else when im on neutral like its not on gear the rpm is normal .

 

[And@fcm]

It will be the stock ecu you'll need to change it to a 5 or 6 ecu

Andy