Originally Posted by Excel
You should be more specific and prove what you are saying as fact instead of just blurting out something you read on the internet
as far as I can tell the catch can is still useful and being sold for newer engines.....
Fair enough. The proof would be what has already been mentioned here by me and other contributor, to wit: The catch can is no longer necessary because Ford went to a fuel injection strategy for 2018+ model yr Coyote 5.0 (referred to as 3rd gen) which features a combination of port injection and direct injection. Given that the primary reason catch cans are used on direct injection is to attempt to prevent or at least mitigate build-up on intake valves, with the introduction of port injection back into the setup for 2018+, there is now the air/fuel mixture flowing past the intake valves from the port injectors that among other things will serve to keep them clean(er) same as port injection always has vs. direct injection. Now, just how much fuel the port injectors are pulsing (IQ or Injection Quantity) depends on how Ford is implementing the combo injection strategy. Is port injection only active at idle and low rpm? Likely. Is that enough IQ to mitigate build-up on the intake valves? Unknown. What is known is the gen 3 Coyote had and still may have an issue with excessive oil consumption, at least in the F150. There are many reports and complaints of this. Ford has issued a TSB to attempt to address it. They have changed out long blocks, and more. The most recent version of TSB I believe addresses the issue with action taken with the PCV system. Since installing a catch can involves the PCV system and since Ford may have identified a cause of the complaints about excessive oil consumption as being related to something about the PCV setup in the gen 3 Coyote, then it stands to reason that interfering with the PCV setup by installing a catch can assembly may be ill advised until more is known about the reason Ford has focused on the PCV setup as the cause of the excessive oil consumption.
If I owned a Gen 3 Coyote no way no how would I install a catch can. The reason is, 1. No proof it's needed, 2. cutting into PCV system = warranty denial by Ford when/if you have the known issue of higher than normal oil consumption.
What do you think Ford's response is going to be if you bring in a 2018+ Coyote for oil consumption and it's got a catch can installed, and the oil consumption TSB is about the PCV system? I would bet Ford expects your PCV routing to be unmolested. If it is altered with an after market device, I would estimate they would deny coverage.
All of the above is why I recommended against installing a catch can on a gen 3 Coyote 5.0. Does that work for you?
As far as catch can setups "still being sold for new engines" "as far as you can tell" (who's blurting out internet stuff now?) ...of course they're going to keep being sold.
Because the sellers want to keep making money.
Sales offers, advertisements, and promotions do not always equate to maintenance best practices. They do, however, equate to continued bank deposits for the sellers.
