Evening all, I have a 57 plate aventura. It suffered a loss of power and started to smoke. would rev slowly all the way up to 3000 revs, press the throttle hard and between 1500 and 2500 revs it will knock like a diesel fault whilst smoking heavily , tank was quater full so I filled it up. It was serviced in september. so i dont think its a filter problem.Drove home in low range. Had a friend out with a diagnostic. No management light no fault codes. Now it won't start without turning it over and over, to the point that it hydraulics on the fuel being injected. Can anyone give me any suggestions?? I was taught to be cautious so I don't want to take it to a garage if I can do my own repair. I look forward to your comments. thanks,Al