vito 108cdi (2001) problems

Hi All can anyone help have got a vito 108 cdi the speedo has stopped working have been told it may be the pulse sender is this true, also
the rev counter is sometimes eratic and although the engine is not racing the rev counter is at 2000rpm the edc light comes on and loss of power and it splutters and coughs have had the larger off the two pressure switches changed on the common rail any ideas am getting fed up Regards
Posted at author's request, using interface
Articles individually verified to usenet standards. Visit URL to contact
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.