This will test your knowledge of this engine. It's a bit of a saga I'm afraid.
My 2009 cooper diesel started one very cold morning (-5) and ran like a bag of spanners. Cutting out, no power when running, really struggling to rev at all.
Got the car taken to our local indi and this is the sequence of work carried out ....so far!
1. Changed fuel filter
2. Checked injectors and no1 showing very low fuel delivery
3. Removed and refurbished injectors
No the car won't start and with better diagnostics identified the fuel pump isn't working.
4. New fuel pump fitted. Signs that the old bearings have disintegrated and possibly contaminated the injectors again.
5. New water pump and timing belt also fitted as pump showing signs of being on the way out and timing belt contaminated. Fair enough.
6. Fuel tank cleaned as traces of water found in fuel and all fuel drained from system.
When all put back together no1 injector still showing low but better than before.
7. Swapped injectors 1 and 2 which identified fault with the injector not the wiring etc.
Car tested and drove fine for a short time then went into what I assume is limp mode, no power and will not rev over 3000 rpm.
So this is where we are at the moment. My thoughts are possibly the engine management system doesn't like the injector swap! Or possibly the dpf causing an issue as the car is only ever used for short journeys and never gets a good blast to regenerate it.
Sorry for the long story but I would appreciate your expert opinion in what to do next. Take it to a mini dealer?