100series cruiser trouble

Hi,

Just looking for some answers to a problem that I am having with a 1HZ 2001 100series standard diesel Landcruiser. Or if anyone else has had a familiar problem.

The problem is a loss of power occurring when you give the car a bit of acceleration and it generally occurs at around 2500 r/pm through any of the gears. It is really noticeable travelling up hills. There is also a bit of a smoke smell associated when trying to keep the revs up going up a hill or through sand etc. So far i havn't visibly see any smoke, but am sure i have smelt it. I have taken the vehicle to my local mechanic and he believes its a fuel pressure issue and wants me to take it to a diesel specialist. The car has been brilliant up until now. I am not sure when exactly the problem started. I only recently had the car serviced and havnt taken it anywhere since, other than down the road to the shops etc where the problem is not really noticeable. It only really becomes apparent when you are giving it a bit of 'stick'.

Any advice is appreciated. The car has 277 000 ks on the clock. So far all in line filters(that i am aware of) and lines have been checked and are clean.

Cheers in advance,
Matt