just traded my 2015 f150 coyote for a new 2023 ecoboost 3.5 f150 with the new redesign motor with fuel injectors on the intake manifold and direct injection do i need a catch can like the older ecoboosts?
Also does the fuel injectors on the intake manifold only come on low speeds or intown driving then switches to direct injection on hwy speeds or both come on together on wide open or towing?
Thanks!

 

Just my opinion but you didn't need one for the 2015. It's a feel good measure - more for your peace of mind.

There is definitely no need with the dual injection. Unless it gives you better peace of mind.

 

It is commonly thought the fuel injectors operate totally separate all the time but not true.
They are shared on a percentage basis depending on the driving condition at every instant. Temp. , Cranking RPM, RPM under loads, emissions etc.
For example, at cold start and dependent on the cold low temperature, there are separate cold and hot tables transfer between the two systems and may even share. This is dependent on Cylinder Head and Map-T temperature values at the time.
The engine types/sizes even has different tables values between NA and Turbo Charged..
There are a number of inputs to the injector tables that add control the final fueling vs conditions so the answer is not either system but a combination for flexibility few other engine have.
Info source is from a Tuning Vendor that changes some of the tables percentage values in their tunes as needed for performance modifications, otherwise nothing is different but the % values for the application.
Good luck.

 

I installed a catch can on my 2022 Powerboost as an experiment. I've been checking and emptying the can into a sealed container every thousand miles or so... or whenever I remember. In 10,000 miles, I have collected only a couple ounces of liquid that's about 50/50 oil and water. You don't need a catch can.

 

On catch cans, consider the following;
Oil through the PCV system is directed to the Throttle Body and ends up passing through the intake manifold and into cylinder combustion.
This >path< is by mandatory design.
If the engine has significant Ring blow-by, the more you ask for high power, the more Blow-by pressure there will be.
The bottom line is to know what you have and what you want to do about it.
Either way that volume amount will not go back to the crank case. It either goes out the exhaust or ends up in the Can.
On my 2018 5L, I do not use a catch Can because there is no significant oil usage.
It's your call.
Good luck.

 

Have a 2011 first gen 3.5, stock/no can. 200k miles on the clock. Saw intake valves with minimal carbon buildup at approx 185K miles. That was when the intake manifold was off to access jiffy fittings behind the heads. Engine runs no different now than new, fuel economy remains the same too.

At one time I considered a can. But the engine doesn’t consume oil. So other than condensation there’s nothing for a can to catch. My truck gets exposed to cold weather. I don’t have to worry about an iced up catch can damaging gaskets and seals from crankcase over pressure.

Have read many posts over the years insisting turbo engines require a catch can and/or valve deposit cleaning. My 12+ years experience with 3.5 in a truck has been exactly the opposite. The dirth of forum posts on actual F150 ecoboost intake valve cleanings makes me think this really is a non problem.

Just make sure to choose a can that won’t ice up and block PCV flow.

2011 XLT Screw 4x4 3.5l 3:55LS

 

Fwiw , I installed one on the gt500 cause I wanted the intake charge clean running thru the compressor, that said a little different from the truck. Now I did put one on the 18 5.0 cause there was talk of oil usage and I wanted to track what was going on past the rings. There was oil collected in it about the same as the Shelby. No big deal really, I can't see it freezing IMO. too much crap in that oil mix, and it is down and away from the warm air flow.
Still have the assembly on the bench, I don't think I will bother putting it on the new truck even though there is never a problem for me cleaning up the intake charge.