I have a Mondeo 02 plate 2.0l duratec petrol with 102000 miles on it recently have had starting problems and then since yesterday intermitient loss of power does not seem any consitency like hot or cold or up hill flat or straight. It looses all power regardless of speed and just cuts out. I have had on dignostics and no faults showing I have had the oil and all filters changed yesterday and the pipes seem ok and also the cat some people have said in forums to try changing the crankshaft vibration damper bolt. Is this expensive and how big of a job plus part. Or does anyone have any other ideas. Many thanks