The saga continues. Replaced L shaped hose at rear on turbo with silicone, ran some more cleaner through checked all hoses, put caravan on to go to Pembrokeshire , every hill was limp mode so that didn't work. Borrowed a mates Ron box and maf and took with me, put it on a couple of days before we were due to come home. Seems to like setting 2, what a difference it makes, pulled caravan home no problems no limp mode just a nice drive. Must have been the maf slightly out of cal as without the caravan it's perfect . Decision time do I buy a ronbox and maf or a new maf.