hi all. got 1.8tdci focus on an 06 plate 93k. been great but has lost power. have changed air and fuel filters but has made no difference. splutters alot for a minute from cold but runs smooth after.
will cruz along at 80 no probs until i come to a hill and the car just slows. then take ages to pick up speed again.

has anyone got any ideas. please help

andy