Let me join the ranks of owners with problems with this engine.
As well as my SRi, we have a Design Estate CDTi 150 that is one of the first of the facelift models (we bought it new in November '05). I had the loss of power problem which was diagnosed by our local dealer as the swirl flap issue, and a new manifold was fitted (thankfully Vauxhall paid 70% of the cost even though it's a year out of warranty as it has a full main dealer history.)
However, although the power has returned to normal, it often runs quite rough and there is quite a bit of vibration (a bit like a slight misfire) noticeable on idling and in the lower part of the rev range. The vibration also comes through the steering wheel (I've had the alignment, discs and wheel balancing checked and they're fine) when driving.
It's been back into the dealers and they thought it was the EGR valve. They tell me they replaced it but it made no difference, and so refitted the original one. They now don't know what it could be and have suggested I try another dealer with better diagnostic equipment (?)
The thrust bearing is worn/noisy but I don't think that could be a cause.
Before I start throwing money at dealers for non-productive diagnostic time does anyone have any ideas please? I've reviewed quite a few of the threads here but can't seem to find similar issues unless I'm missing it. I don't think ours is old enough for the infamous third injector problem, or is it?
Many thanks in advance for any help!