Last week the Dpf on my 55 plate focus 1.6 tdci blocked and blew a pipe. Since then I have had it changed and also the turbo replaced. The car is still under powered and you can hear a hissing coming from under the bonnet every time you put your foot down. Can anyone help me.

Check the rubber pipe between the intercooler and the turbo.

Mine split (apparently it's a common occurrence) and produced a hissing noise during acceleration.

Cheers for that ill let u know

You haven't got a drawing to show how to replace and find the intercooler pipe have yo?

I've done a guide with photos (see my signature), but that's for the 1.8 TDCI.

You would need to compare the under bonnet view of your car, to the photos in my guide, to see if the layout is the same (or sufficiently similar) to allow you to make use of it.

The pipe should still be to the drivers side of the engine.

Just to let people know my problem has been fixed. It ended up being a split in the intake manifold.

Ouch.

Note to ones self make sure to replace dpf when needed!