Hi, im having a intermittent issue with my 120 D4D Land cruiser, so ive had injectors replaced, air mass sensor replaced, seals replaced, but for some reason its burning oil and a misfire on start up, can't drive it cold or massive knocking, but the oil cloud on start up is only when it isnt used often, i may use it all weekend and only shows Saturday when i first start it, all day Saturday, all day sunday, nothing after its been used, leave it a few days and boom big oil cloud, im stumped