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Any one know this Combustion chamber clogged w/carbon. chemical cleaning needed

(2011 Hyundai Santa Fe)
in Potwin, KS on February 05, 2013
check engine lite came on-still in warranty. dealer said "actuator for butterlies that run thru intake manifold" broke due to "combustion chamber clogged w/carbon" they will warranty replace actuator, but i must pay for "chemical cleaning of combustion chamber" car has 38K miles, 2 yrs old. Never had that issue on my 10 yr old toyota w/150K miles. is the dealer telling me something legit or blowing smoke up ...
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Popular Answer
of Greg's Orange Auto on February 05, 2013
wow carbon can build up but never seen that.i just cleaned my tundra at 45k miles and it wasn't bad at all.there might be some smoke going on
on February 05, 2013
I see smoke........and I'm on the East coast!!!Ask to see the supposed carbon build-up (not photos of another engine)on your engine.
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