Hi Guys need some help..

I thinks its a mk3 mondeo.... its an 03 plate 2.0 tdci 130 bhp

The car has a weird fault which is causing it to drive strange ill explain as best as possible. By the way dont know much history on the car as its been bought by my boss with little history.

1st,2nd,3rd gear car pulls ok but dont seem as punchy as it first did i.e the turbo pull and seems more flat

4th its spluttering bewtween 2-3k revs and when travelling at higher speeds its feels like your preesing the brakes and slightly and letting off.

5th -6th is the same its rocking backingwards and forwards like your on the brakes like a loss of power then it kicking back in

car sometimes looks like it smokes alot but not allways ticks over fine and getting 550 to the tank and thats taking it easy its had a full service when purchased all filters and oil etc

anyone have a clue ????

thanks in advance