Pretty sure newest generation 2.7 EB uses both DI and port injection? Port injection keeps everything clean?Carbon is super sticky and it builds up anywhere inside the combustion chamber and after. If you have carbon build up on the "cold" side of your intake valve you have a separate issue and PFI is not going to solve that.
PFI produces less carbon buildup because it has better atomization of fuel. Modern DI engines are better than past generations because fuel rail pressures are getting much closer to diesel fuel rail pressures (most current GDIs have a low and high pressure fuel pump), and improved injector design leads to better atomization compared to previous generations.
Sponsored