Strange S40 turbo problem

Sat280 · Post by **Sat280** » 07 Oct 2011, 21:40

My 2005 S40 has been having some strange issues with the turbo lately. Upon hard acceleration or acceleration above 60 it seems to "chug" or "sputter" out. This is accompanied by a slight shutter, lose of power, but no changes in rpm. If I pull over and turn the car off it resets itself and all is fine. Problem is sporadic but seems to be getting increasingly worse. Anyone have ideas?

claymore850 · Post by **claymore850** » 09 Oct 2011, 09:59

Check all your vaccum hoses, its seems like one is pushing air inside on the hard aceleration, and came back to position on deceleration..

Also take a look on the air intlet hose, near the turbo, cracks on the lower side its a common failure on volvo turbos. due the excesive heat builtup.

volvodoc · Post by **volvodoc** » 18 Oct 2011, 12:25

replace the turbo boost valve its under the exh manifold on pass side its a tight spot but have replaced several for this problem