So which one used in our current CU2 Euro? Direct injection or high cost high pressure injection?

Quote Originally Posted by BigBen View Post
The problem with direct injection apart from the high cost of the high pressure injectors (10X more than standard injectors) is that on high km engines carbon builds up on the back of the intake valves.

In normal port injection system the fuel washes the carbon off the intake valves, with direct injection nothing is washing the carbon off the intake valves.

The carbon builds up due to blow by from the PCV system so a catch can would be needed and very clean oil that does not flash should be used to reduce the carbon buildup.