Low turbo pressure

Hey,



I have a 25 TD and i think it have lower turbo pressure it should have.



I don´t have an analog gauge but i have the scangauge and the max value it reads it´s about 15.5 PSI. I think it should be around 17psi right?



I think i´ve seen that value (17psi) a long time ago, but i´m not sure.



It´s an easy thing to ajust is properly? I have no big mechanics knowledge.



Anyone with a scangauge and stock turbo pressure can see please which value your reads?

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