Hi all,
can anybody offer some advice please?
My rr sport 2013 tdvi 3.0L is struggling....we have put a smoke machine on to test the inlet side of the manifold, as previously it was suggested the hard plastic covers may be cracked.....we have a lot if the fog coming out. Would there be some fog showing anyway or should it be completely sealed?

Also, if I need to change them, what sort if a job is it, is it quite complex?
Any advice would be appreciated
Regards
Nick