O.k folks it looks like time to investigate the EGR valve, from the look of it , it's a pig of a job to remove it for cleaning, so it looks like the aerosol spray treatment, i'm not really convinced that this method cleaning in-situ is ideal or the real cure, it may just improve things temporarily. In your trusted opinions is it worth trying or should i bite the bullet and get it done properly? - anyone tried and had success with the spray methods?
Thanks!
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