Hi All

Hoping someone might be able to help/has seen the same symptoms.

I have a 2007 Ford S-Max 1.8TDCI 125 with 93K on the clock.

I recently serviced the car; oil, oil filter and air filter.

Before the service the car was really reluctant to rev out until it had warmed up fully, once warm, it drove without any hesitance.

This hesitance has gone since the service was completed. However, after the service the car has started making a hissing noise when I put my foot down, which I am assuming is the turbo but not a good turbo noise?

I had a garage check it out when they did the MOT about a four days after the service and they said it's nothing to worry about.

Since then (4 weeks after the service) the car has started to get more and more smokey.

At first it was only when the boost kicked in but now it is dropping a small black cloud if I rev it stationary and I've now noticed black smoke when driving at motorway speeds. I can see a little cloud pop up around the rear window.

I've done a load of searching and reading but so far it has pointed at a number of things which isn't helping me pin point the problem.

I still have boost and the car gets up to speed reasonably well, so I'm hoping that points to something other than the turbo failing.

I've looked over most of the intake system from airbox to EGR as best as I can. I've not had it all out to inspect fully, I only found a pin prick hole in the intercooler to EGR pipe, is that enough to cause issues?

Has anyone had the same symptoms and if so, can they advise what it turned out to be?

Thanks in advance,

Sam