The 5.0 is not DI, it is standard Multi-Port EFI.
DI = a high pressure fuel injector is in the head just like the spark plug
MP EFI = the fuel injector is in the intake runner above the intake valves
The DI is a more efficient method of fuel delivery but like all new tech it brought an existing problem to light. The build up on the valves was really bad in the first generation of DI engines. The later models have many things done to address this issue. Ford was not making DI engines when the problems were the worst. I asked my service department if they have had any problems with this and so far nothing. In fact the only problem they have had on any EB motor is 1 rear main seal.
2011 Platinum Ecoboost, 2001 VW Jetta 2.slow, 1986 Porsche 928S
Originally Posted by Jeremy Clarkson
A turbo: exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster.