Yes, on boost.
think i may have solved it.
I put a silicone pipe from the inlet mani to the rocket cover and i think that was closing up when i was on full boost.
I may need to replace the pcv valve soon as well as there is quite a bit of movement in it.
bet your glad!!
Just a bit mate lol
I have changed the hose back to the original one. That hose is a lot more stronger and don't close up when hot and on full boost.
lucky you hadnt the engine split!