In a citroen but same as the pug 1.9TD methinks. Any specific things jump to mind when i say no real oomph from the turbo anymore and clouds of black soot when it should be boosting. I'm guessing its lost a hose or split one somewhere, are there common ones to check first? (not my car, dont want to spend forever stripping it to find it was a simple thing i could hav tried first) J