Ecoboost Intake Valve Carbon build up ?

Sorry to revive a dead thread, but I'm planning on cleaning the build up in my car. I bought it used at 41k miles from the dealer. It's CPO for what it's worth, but I'd still like to clean it just in case.

Do you think this is a worry for me?

Would putting a throttle body injector help the original issue?

Hey, I did some extra googling and it looks like stratified sells auxiliary fuel injectors that help reduce the buildup.

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That's spensive! Still cheaper than having someone pull the head and clean off the valves.

This is kind of a silly question but would putting steam into the intake track help at all? Like, really get in there with a dense steam or is this just pipe dream?

The tool's aren't too expensive, but it's getting to the intake valves that look like a pain! I don't fully know my way around an engine yet, but I'm just assuming it's a bitch.

The required disassembly to get to the valves alone is a killer. I just recently watched a YouTube video of a guy that blasted the valves without removing the head on a VW.
His process kind of went like this, pull the intake runner, stuff the intake ports with rag, hand crank the engine so valves are closed, blast and shopvac at the same time to pull the walnut shells out, repeat all steps as needed.

Without looking I don't know if our intake ports are in the front like on the VW this guy was working on, if they aren't that's kind of going to suck.

Interesting, I hadn't considered the cleaning benefits of the aux fuel system.

after CRC intake valve cleaner.

At 11,500 miles
View attachment 17604

after CRC intake valve cleaner.
View attachment 17605

View attachment 17606

Yes, their 4 PORT auxiliary system is what will REALLY help this symptom of DI out (besides the aftermarket hybrid/big turbo power/tuning benefits/necessity), as the throttle body SINGLE injector system has VERY uneven distribution to the intake valves, and not enough force to REALLY keep them gunk-free.

Where did you squirt it into the intake system from?

That's pretty impressive!

Most would say it could NEVER do even close to that much cleaning.

Was this just their GDI intake tract spray can, or does CRC have a whole multi-piece, multi-stage 'kit' like 3M and others do?

Could you image how hard such an uneven fuel distribution would be on the engine? I think that DHM found the limits of the 5th injector systems with a lean 3rd cylinder, but that kind of uneven distribution is an order a magnitude (at least) from having any effect on unequal value cleaning.

Also, don't the 4 port systems just spray into 1 of the 2 intake runners per cylinder? The Boomba Racing plate does. I don't think that the intake runners are connected inside the head so the 4-port AUX systems don't "clean" 1 of the 2 intake values per cylinder.

I'd guess that the benefit, if any, of the aux fuel systems with keeping the intake values clean is more by keeping the oil in suspension than by actually cleaning the values. None of these systems are cleaning the valves with fluid gasoline or with any more or less "force."

That said, after seeing the pictures of buildup after 11,500 miles, I think that I'm ordering a catch can. [MENTION=5976]ron@whoosh[/MENTION] - incoming!!

Where did you squirt it into the intake system from?