Hi, I had a td5 that played up after an oil change to the box, some say leave the oil box alone (do a search), my issue was the same as yours lack of power, and was sorted by not enough new oil being replaced by my inde garage, they failed to do the engine running and go through the gears as you fill procedure, once topped up it was fine.
i also tow a large c/van, you wont find a better car than a TD5, yes you feel a difference but with a change in driving style (and in my case a remap) you can take a 2 tonne van add another 6 tonne of kids toys, canoe, dog and family , read the road ahead, use the gears and take corners a little wider, jobs a goodun! Brilliant Car!
But mine had to go, with a wife nagging about costs of repair and the sheer size of it my needs changed and so an Audi Allroad is my chariot currently, caravan is next to go.
Good luck!
M
i also tow a large c/van, you wont find a better car than a TD5, yes you feel a difference but with a change in driving style (and in my case a remap) you can take a 2 tonne van add another 6 tonne of kids toys, canoe, dog and family , read the road ahead, use the gears and take corners a little wider, jobs a goodun! Brilliant Car!
But mine had to go, with a wife nagging about costs of repair and the sheer size of it my needs changed and so an Audi Allroad is my chariot currently, caravan is next to go.
Good luck!
M