Grit Valve
2000 4.6 Vouge
Sooty is normal, the smoke to me doesn't look dark enough to be too rich by the sound of things and that horrible smell its burning oil when you leave it oils runs down the valve stems in to a piston chamber and has to be burnt it off when started IMO just an opinion you could have work valve seals short mileage I know has oil been changed bad seal assembly Anythink . Once hot and enging is working less oil has chance to build up do still smells but less smoke untill left again