tekic, Did you do the oil mod? Do you know the thickness of your head? What HG did you install?
Keep in mind the head is oiled last, so pressure and flow are reduced by the time it makes it to the head. But from reading of the Kiggley HLA regulator, the HLAs need about 15psi.
It can take 30 or so minutes for them to shut up with 50psi or so being pushed through them so they can lock into place.
Also if the HLAs have age on them, and went thu several infrequent oil changes they can varnish up causing the valve to stick. Cleaning them as the FSM says can make matters worse by softening the varnish.
At this point disassembly or replacement of the HLA is needed.
Now these come from the same manufacture that Mitsubishi used when the factory was buying them. click
They are the revised 3g style.
EfiniX, If you have not ordered a set, I would suggest the above set.
Fiascoxl, I know about that link.
You can find it on this board.click
You may like this one too.click