Hi guys

Ive got a 03 evo 8 gsr with Td05HRA turbo full exhust system, manifolds, wastegate ect,ect the typical mods. Anyway i was out the other night for a boost, car was running mint i gave it a couple hard pulls but nothing over the top then i went to do another pull and jst before i hit full boost it started lagging and jumping like crazy, boost was fluctuating like crazy i thought i burst a hose or something but got home checked it over and there was nothing i could find, pulled turbo off checked everything it was fine from what i could tell (im no expert) and it does this in every gear.

Any advice will be appreciated.
Cheers

 

Boost leak test / check vacuum lines