1. If you look at the high mileage F150's with port+direct, the valves aren't nearly as clean (although, they are still cleaner than DI only engines) as the engines with just portOne of the reasons catch cans are used, is to lesson the build up of deposits on the back side of the valves (direct injected engines). All of the S650 engines now use both direct and port injections. This keeps the valves clean and allows for better emissions. Yes a catch can will trap both moisture and volatile vapors, so if it makes you warm and fuzzy, do it. But ask yourself why this wasn't an issue until direct injection became the norm?
So you plan to keep this Mustang forever? I’ll give you a little advice, every year Ford makes a better Mustang.I thought these cars would come with one especially the performance pack models but that looks not to be the case. How necessary is it to get one? I plan to keep this thing forever and I want to make sure I treat it right from the get-go
It’s always been an issue ever since the introduction of the pcv, it’s not simply the backside of the valves but the whole intake that gets coated with the fine mist that is.One of the reasons catch cans are used, is to lesson the build up of deposits on the back side of the valves (direct injected engines). All of the S650 engines now use both direct and port injections. This keeps the valves clean and allows for better emissions. Yes a catch can will trap both moisture and volatile vapors, so if it makes you warm and fuzzy, do it. But ask yourself why this wasn't an issue until direct injection became the norm?