I have turned in the fuel screw 360 degrees ( one round ). And the idle is adjusted to good 800rpm. But I want just a little bit more boost. Can I just put boost controller between the turbo nipple and wastegate and add like 5psi?

Hello. I have a Navara TD25TI and a workshop manual of D22, but i cant find the nvh troubleshooting and the instructions to change de drive belts. Can anybody help me? Im from Spain, my english is bad, sorry!