Hesitation/stall help

[Gazdkw]

The car has had a random hesitation recently. No pattern, it will just hesitate when cruising along at say 30, it quickly recovers. It's happened 2 or 3 times over the last week.

Today it very slowly lost power and stalled. No stuttering, no drama....the engine jusy slowly and calmly slowed down and then died. I managed to pull over safely. No lights or warnings.

It would not start initially but after a minute or 2 it started. I revved the engine hard for a minute and it drive fine back home.

I have investigated the EGR and it seems fine. Not clogged up or anything. A couple of the sensors were oily so I have cleaned them out.

Any ideas?

Some info that might help.

It's had a new fuel filter around 6 months ago and oil and filter change.

The swirl flap has recently stopped working (I noticed it around 5 months ago) it's drive fine up until very recently so I doubt that's the issue.

My suspicion is that it's happening only when under light load. The few times it's happened I have flipped gear selector into manual and revved the car and its been very responsive. It's also never happened when towing the caravan (which we didn2 weeks ago)

A mechanic friend of mine said it could be one if the injectors starting to break down.