Still carbon buildup on latest tsi engines? in VW Golf R MK7 Chat Posted April 15 · Report reply I wonder if anyone has put together a comprehensive parts list for a EU manifold/ rail/ injectors/ wiring/ associated gubbins to convert a NA Golf7 R/ GTI to dual injection. Does the stock NA ECU even support this? If anything, it would curb carbon buildup and better support the increased fueling requirements of running E85 fuel. I have a thing for factory parts bin builds!