jimbbski said:The only engine that I own that has DI is my 2013 F-150 with the 3.5 V6 Eco-boost engine. On the F-150 forums installing a catch can is a popular discussion topic. I purchased my truck with high miles and while I haven't checked the intake I have not experienced any of the issues that would indicate coked up intake valves or gummed up throttle body. I think as someone posted earlier a particular engine may or may experience this problem. It depends on how the vehicle is used/abused as much as any other cause.
I'm glad to hear this because I have the same truck. Mine is a relative baby at 62k miles, but it doesn't have any issues. In theory boosted engines have more blow-by and thus more junk going into the intake tract, but if the motor is healthy in the first place I was never convinced that the can did very much. I never caught much junk in the can of my turbo Miata, and that was a lot less conservatively tuned than an OE turbo car.
