Re: 2.4 diesel engine running rough?
I think this is a design problem to a greater or lesser degree on the 2.4JTD engine. It is probably worse on some engines compared to others, and of course some of us might be more aware/irritated by it than others. After following these posts for about a year I am not convinced there is a fix for this. I've already had new injectors, fuel filter, turbo, manifold, egr valves, DPF regen, etc.. The engine might be fine for a month or even longer but then randomly start to play up and just not be able to get up a hill or even stop.
I am taking legal action for my car as I believe this is not at all acceptable for the Alfa brand. I had a 156 before this and the engine was a gem - actually converted me to Alfas.
I am sure Alfa know of this problem and I'm also fairly certain they can't fix it. My advice to those who have significant problems is to keep a log of all the episodes and service visits for future action should it come to that.