Intermittent Power Loss

[Clubscene]

Hopefully some of you kind folks on here will be able to help me with this issue.
Im experiencing an intermittent power loss on my 2002 X5 3.0 Diesel. It happens generally whilst driving along at 60mph, I go to put my foot down to accelerate but nothing happens, the vehicle remains at the same speed dosent try to shift down gears or rev any higher. After a couple of minutes the fault seems to clear and its fine again I have noticed it more when driving up an incline.
The vehicle was checked at the dealers and they found some fault codes for fuel pressure (prob due to fuel filter having been changed) and something for the turbo. They cleared the faults, dove it tested it again and said nothing appeared to be wrong or out of the ordinary. It drove ok for a couple of days afterwards but the fault reoccured again after that

Just to add, the car is very smokey when accelerating. Mentioned this to the dealer and was told its normal on a diesel BMW.

Any help greatly appreciated as Im out of warranty.

Simon.

[mtX5]

I have a 2002 X5 3.0i that would lose power at very low speeds (in parking lots, in bumper to bumper traffic, extremely sharp but slow turns). The dealer couldn't replicate the problem and thought changing out the fuel pump fuel filter would help. Costed me over $600. The next day I filled the car up with gas and as soon as I began to leave it lost power and shut off. A friend of mine that works at the sales department recommended I use Shell V-power. He thought maybe it had to do with ethanol being added to gas and mixing unevenly. He said V-power had more detergents and to try it out. So far ever since I started using V-power the problem has not occured again. So I guess spending 20 cents more per gallon is worth it? haha.

[Clubscene]

Thanks for the reply MTX5. I also have a 2005 X5 Diesel which runs on the same diesel and is driving fine. So I doubt its a fuel quality issue.

[Clubscene]

Anybody?