Ok whare do i start.i got a sapph cuple of years ago,stage 3 t34 greens 3bar map sensor, and from day one i noticed it smoked right bad wen going down a hill,in gear with no throttle (no smoke) and then re-aplyn throttle it smokes like mad for few secs then clears.other than that its perfect.no smoke any other time.i re-built the full bottom end last year due to a bit of a mis-hap! it got re-bored,0.5 oversized pistons,acl bearings bla bla.so i thot wotever the smoke problem was it wld av been sorted. wrong! during run in period i noticed it was still doing it.exact same! no better and no worse! i used genuine ford valve stem seals on the head aswell. now,wen iv been looking into this i have heard more than one person say it cld be valve guides worn! but how can oil pass stem seals only when it does? (re aplyn throttle going down hill) PLZ HELP!!! O,the turbos been done Twice by CR turbos so its not that.and the breather systems doesnt seem to b blocked. cld overfueling cause this??? any help wld b very very much appriciated, thanx Richie...