Quote:
Originally Posted by insanesam
thanks for the tip.
is having the carbon build up detrimental to the car?
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Well it wont cause an engine failure, but it will be down on power, idle poor, and may use slightly more fuel.
The thing is our engines have a direct injenction setup and in a conventional EFI setup the combustion cycle is somewhat 'self cleaning', but with DI the setup is completely different so you cant use a cleaner like the popular subaru upper cylinder cleaner which you add to the fuel.
Have a look at this thread:
http://www.e90post.com/forums/showth...rect+injection