hi mike, sorry for the delay. my car has covered 123750 miles, serviced regularly and about 18 months ago the epc light came on and engine derated when I tried to accelerate. switching the ignition off cleared the malfunction, but I had to be careful not to accelerate too quickly. This was no. 1 injector which was replaced and fault cleared.
There are no warning lights on and the black smoke I used to get seems to hav e reduced when I accellerate. I did discover something important yesterday. I wanted to check how much smoke was coming from exhaust and when revving the engine to maximum it would only rev to 3000 rpm instead of 5000rpm. The revs cut out at 3000rpm leaving the maximum throttle travel dead.. the turbo appears fine. When I first bought the car It passed the smoke test with 1 rev of the engine as the reading was so low but the last 2 mot's I have to clear the exhaust by revving the engine to get the readings down. The car does 80 mph @2500 rpm and would explain why the accelleration is poor when I put the pedal to the floor as that end of the travel is dead.
Hope this has narrowed down the area of problem.
I'm very pleased to have helped you - but do ask me if you need anything more..
Kind Rgds, MIKE
Feedback and any Bonuses are always appreciated too. Thank you.