Oil Catch Can on V6 3.5 Ecoboost

[FaaWrenchBndr]

The Ford 2.7L and 3.5L EcoBoost engines with dual fuel injection (port + direct) fires almost all the time at light to moderate loads. The port injectors wash the valves constantly which results in almost no oil ever reaching the valves. Fords Ecoboost 2.7/3.5 and 5.0 Coyote (2018+) with dual fuel (port + direct) runs on the port fuel injection at 80–95 % of fueling except WOT. The only time the direct injectors fire is at high load or cold start enrichment, maybe 5–10 % of total operating time.

I believe Toyota was the first to use both port and direct injection together with their D4S system. It uses port fuel injection for cruise and part throttle situations and direct injection only under high load. This system uses port injectors at 95 plus % of operating time. Ford basically copied Toyota’s D4S system with their system.

Again, engines like the Ecoboost 2.7 and 3.5 and 5.0 liter engines with dual Injection systems (port + direct) don’t need catch cans because the port injectors spray fuel directly on the back of the intake valves 100% of the time you’re not at wide open throttle. That fuel wash keeps the valves clean the same way every pre-2008 engine stayed clean. Not much different here.

Bottom line, adding a catch can on an engine equipped with dual injection = waste of money. If you have blow by issues then adding a catch can at that point is again, a waste of money.

I guess you have reading comprehension problems. This valve deposit crap is still an issue. The dual injection only pushed it down the road a little bit. Around 130 to 150k miles.

Do some research on it. The information is out there. Catch cans are 100% needed on a turbo engine and/or an engine that has direct fuel injection.

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[JCsTruck]

I guess you have reading comprehension problems. This valve deposit crap is still an issue. The dual injection only pushed it down the road a little bit. Around 130 to 150k miles.

Do some research on it. The information is out there. Catch cans are 100% needed on a turbo engine and/or an engine that has direct fuel injection.

LOL, I did some research and noted it below. No hard feelings on the reading comprehension jab . let's just stick to the facts and see what the actual high mileage tear-downs show. Looking into some YouTube videos I found the following videos that show what these valves look like with high mileage.

Here is an example of an Ecoboost 2.7 with 169k miles on it. No carbon buildup.

Here is a video showing a 2013 gen 1 DI only 3.5 Ecoboost valves with just over 100k miles vs a 2019 gen 2 with duel fuel injection at 125k miles vs a port fuel injected only engine. Interesting results on this one. . Read the comments on this one. I didn’t think the gen 2 was that bad for 125k miles but the port injected engine is cleaner. Perhaps the owner of the 3.5 did a lot of towing resulting in higher demands on the engine which favors DI more than PFI. Here is a valve from direct injection engine only for reference.

This guy does a great job of explaining the benefits of each type of system explaining the pros and cons of each and also explains duel fuel injection systems.

This engineer in this video does a good job of explaining how Toyotas D4S system operates. At about 8:50 is where he gets into the topic of duel fuel injection.

This video is short and explains it all quickly.

Walnut blasting is what you want to do to a direct injected engine like this.

I took my 2014 Mazda CX5 intake off at 78k miles to clean the valves myself. That engine is DI only and had been serviced by me regularly. The valves looked like the valves on in the first video above showing the gen 1 3.5L Ecoboost V6.

 

[ridesdirt]

Good info in here, and good timing for me. I guess I am old school, I go by the rule that anything boosted can benefit from a catch can. I have a new to me 2022 KR eco-boost. My BIL and I always get each other something for Christmas, he is getting me the UPR catch can kit, I am getting him pewpew stuff. Is it needed? Probably not but if it makes me sleep better at night, that's what matters, right?

 

[MaxMaster1]

@MaxMaster1

Thank you for sharing the information! Then it's very strange that not everyone has this valve.
Maybe it's all about my stripped-down limited edition of the initial production period. Unlike the rest of the limited ones, I do not have an CCD suspension

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