1.9 JTD loosing more and more power. It is running cool and generating some dark smoke sometimes. MPG has gone up! That may be 'cos I can't thrash it now. I think maybe piston rings but I've had loads of other theories from amateur mechanics! Any more please.
If the engine managment system detects a fault within the system they can go into limp mode wich will limit the power and the max rev's will only be 3000, also air flow meter's are a common problem on these, they will not show any faults in the system and can also limit the rev's to about 3000