This is forum member Javi3r187's RS4. We did a standard CB service on it, oil & filter change, & a new fuel filter. He has recently done spark plugs as well.
Car being over 75K mile mark and never had a cleaning done we were assuming it to be pretty bad and we were right.

Here are some pictures! Enjoy! If you want to do this cleaning on your direct injected motor let us know!

 

What does Audi (& others) suggest for this kind of carbon buildup on the new direct inject engines? I've heard nothing of this maintenance being covered under warranty and a lot of sub-30k cars with significant buildup causing problems the dealers aren't covering under warranty?

How often does it need to be done? What are the downsides to not doing it?

 

Depends on the dealer. I recommend doing it every 20-25K miles. As it builds up you lose horsepower/torque.

 

Is this something that occurs on the V10 S6 as well?

 

I would be really pissed if I spent 70k on an Audi RS4 and this is what I bought....

 

Is this fouling in any way ethanol related, or more a direct injection phenomena?

 

Mostly direct injection

Unfortunately yes

 

Have you performed this service on a V10 S6? Do you have any pictures to share? Please PM me a price to perform the service. My fathers S6 is around 55k miles.

 

PM sent!

 

Kia, would it be safe to assume that EVERY Audi built V8/V10 will suffer from this problem? Or, on a larger scale; is EVERY engine with direct injection going to have an issue with carbon build up no matter who built it?