D5 issues, turbo adjustment

[fgx318]

Hi there, back with the limp mode on my 2004 D5 v70, intercooler and VNT replaced, engine mounts bypassed but still goes to limp mode espacially when the engine reaches is normal temperature. I finally went to my volvo dealer. He found numerous codes, I told him what I did and what I replaced. He found air charge pressure problem and told me that it could be the turbo building up to much pressure. I found the TNG to be adjustable so I loosen the nut on the rod but realised that the rod needed to be unscrew and that the rod is held on a lever by a clip. It's a tight fit so does anybody knows if adjusting the rod would cure the pressure issue, I wouldn't want to waste a day working on the turbo. Thanks for your help

PS : I didn't read the codes on the Vadis software