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Carbon Build Up


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  • 9 months later...

Your engine has dual injectors. Both direct and port. The port mists fuel over backs of valves, and mostly eliminates the problem. The carbon build up problem has been occurring on vehicles that only have direct injection. And I have read of problems on Audi, MB, And BMW vehicles more than  Ford engine vehicles with direct injection only. BTW....Most Hyundai and Toyota vehicles have dual injection also. 

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