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Discussion Starter #1
Now that we have an engine that is GDI “Gas Direct Injection” deliver, we have to figure out how to keep out intake valves clean. I wonder did Honda do anything different to combat this problem? EVERY car manufacturer is going to GDI fuel delivery, every car manufacturer has the same issue.
I’m doing some research and I found this on YouTube.


I’m not going to bash Honda because this is a common issue with any GDI engine, even worse for the “turbo charged” GDI engines.
If you guys hear if Honda did anything different to there GDI engines, please post it.
 

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I’m not exactly sure what Honda has done to combat the carbon buildup issues common with GDI, but I have heard almost zero complaints of any issues since they first started using it in the 9th Gen Accord i4's back in 2013. Six years of driving with millions of cars on the road would have surely shown any issues with carbon on the valves.

I know Toyota, and now Ford, are using port and direct injection on their engines.
 

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There is some debate on whether the old “Italian tune-up” is beneficial or not. Most agree that for it to be effective, the higher revving should be sustained for a short period of time, a minute or more. Most of the time, people punch the throttle for a few seconds then lift off. Not sure that really does a whole lot.
 

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I had some real Carbon build-up problems when I purchased my wife her first Honda Piliot. 2017 with under 35K miles. When it started it cold it would idle rough then smooth out after it warmed up. By the time it had 45K miles the misfires started getting real bad and the Check Engine Lights started flashing while driving. I ended up walnut blasting the valves which took care of that problem. It's not complicated but it was a quite a process to do that. Now we have 89K and it's ready for another cleaning. I found this article online from a company called ATS Carbon Clean. They have a very different way of treating it then the traditional Walnut Blasting.
Has anyone ever had there car treated with this system before?
I want to try it on my Passport and wife's Pilot.
Here is the article I found>
 

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I installed a UPR catch can, when the engine had 700 miles. Then I drove it 1300 miles over a weekend, and found some oil in my catch can. Enough to coat half of the bottom of the can.
My "clean side" hose, which goes to the top/center of the engine did not have any oil or oil residue, because the can did its job.
 
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It's amazing what regular oil changes with full synthetic oil, using premium filters and gasoline can do to keep your engine clean. I see a lot of people here (and other forums) trying to do oil changes as cheap as possible, or purchase gas at the sketchiest stations in town because they'll save 5 cents per gallon. :rolleyes:

Top quality oil, filters, and fuel will save you a lot of maintenance later on. I'm not saying this will take care of carbon build-up all the time for everybody, but it will for most.
 
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