cheers bud nice one, thanks.

yes especiallly when pulling the van, the disco really drops off when on the motorway going uphill. Do u think blanking off the EGR would help ?

Thanks very much Lyron, i will try that as soon as this dam rain stops and i can get my wife to venture outside. I live in Mossley a small town 10 miles from Manchester. I will let u know how we get on. Once again thanks for the reply.

Ive got a 1998 discovery witha 300tdi engine, for a while now ive noticed what can only be described as a high pitch whistle coming from the engine when im setting off and changing gear at about 3000rpm. Has anyone got any ideas as to whats wrong and how i fix it ?