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Need input / carbon buildup on intake valves

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Need input / carbon buildup on intake valves

Old 09-23-2008, 02:13 AM
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Join Date: Sep 2008
Posts: 12
Default Need input / carbon buildup on intake valves

Would appreciate some feedback!

Got an '08 A4 / 3.2 / quattro with only 7k miles. On my way home from pickup at the dealer's shop doing a 7500 mile maintenance (essentially an oil change!), I got a "check engine" light. After a week of diagnosis, they tell me it's due to excessive carbon buildup on the intake valves and need to replace the injectors.

Is this at all possible on a new car which has had only good gas used in it? Is it possible the dealer could've done something to cause this?
Old 09-23-2008, 08:17 PM
DraxeofDclan's Avatar
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Join Date: Jul 2008
Location: Rohnert Park CA
Posts: 241

Define "good gas". Only Chevron touches my tank, 130k and no carbon. Get a VAG or ask what the code states. If you put a solvent/mix-in with gas, to clean the carbon, the code should reset itself after no more than 2 weeks.
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