I Have a S80 with D5 2.4 desil engine when i start up car itwill accelerate quickly but after that it does not want to rev out over 3000 revs and it takes a long time to get the turbo boost. Somestimes its ok but mostly not. Does anyone know or hasexperienced the same problem.

 

Have you put in a new fuel filter lately (if not i would)? Check for a leaking turbo hose connection?
ALso, is the check engine light on? Has it thrown any codes?