Apart from my 2.2 hdi coupe, I own a 307 2.0hdi 90

but for the past year or so, it seems to have been lacking some power!!! Considering my sister n dad have been using it since May last yr. But now I've got it back its really horrible to drive. You put your foot down to go n she don't go

its feels like you have a blown turbo, your rev it so hard n put your foot down n as you climb up the gears it starts to pick up but still lack.of power. At first we thought the clutch was slipping so had that done but made little effect. PP2000 brings up no fault codes so no help there. I've unplugged the map sensor n still no difference. I've read on some forum's people have had the same problem, but not a lot has been said about the any fix on this n to be honest I don't know where to look on this as the back if the engine is so far near the windscreen I don't understand how your meant to work on the back of it lol I've heard some say it may be a vaccum fault, or something to do with the wastegate? Or egr related.
Any help or suggestions appreciated

Or I might cut my losses n get rid n go back to the days of a 306 d turbo
