Quote:
Originally Posted by Stealthee
I disagree that carbon buildup isn't an issue on fuel injected engines. I have torn down or been witness to several torn down engines and the carbon buildup on valves and pistons is no different on fuel injected that it is on carbureted.
The best way to clean the carbon out, without invasive procedures is to use something like Seafoam. You let it suck in through a vacuum line and let the car sit a few minutes and the white smoke show you are left with is indeed carbon burning off the valves and pistons.
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Don't ignore the fact that the engines you are talking about were in need of major maintenance. To me, that means that it was not running right in the first place and probably not driven normally. I was referring to engines which are operating normally. There is no reason for carbon to build up in the cc when the fuel/air ratio is tightly controlled by a fuel injection system. Burning oil and excessive blow-by can cause this, but it is not a normal engine if it has these problems.
If you have carbon build-up in a fuel-injected engine, removing the carbon is the least of your worries.