My compressor is around 7bar and after air passed though matrix and mesh it's probably dropped to around 2 bar and is defused a lot ,so I don't think any damage to LP egr possible, I'm going to tap into air line a tin of carburettor spray( should be ok to any plastic or seals) cleaner with total evaporation.All attempts/ ideas welcomed. As alternatives propriety DPF cleaners squirted up may be safer than high pressure caustic (not reccomended). The resting position of the valves (cold) would be usefull to know to prevent soot / caustic / rinse water being blasted down the turbo.
Worth a try !