Thanks for the replies fist off I had the injectors tested 2 were completey stuffed and 3 needed replacing. If you listen to the sound on a stereo that has a bit of bass you would hear the deep chuffing sound from the air box. The car is unregistered so I can't drive it. There was a small amount of white smoke coming out of the exhaust the mechanic thought the dpf was blocked so he did a regen and it seemed to run a bit better. He put the scan tool on it and the codes were as follows
6664 glow relay control faulty signal
6665 glow relay control faulty sensor
5660 oil level sensor faulty signal
3553 misfire cylinder 5 emission agitation
28E0 heated oxygen sensor (HO2S) faulty signal
2B10 particulate filter tempature sensor faulty signal
2810 heated oxygen sensor (HO2S)faulty signal
He is going to try a compression test and see what happens, I don't have the equipment to do these tests so will see what happens
Regards Bob