Carbon cleaning?

[Kbui]

I took my car to the dealership for the wiper motor ground wire recall and when they were done they recommended the carbon cleaning procedure for $90.

What is that procedure? Is it needed? Is it easy enough to do it yourself? The dealer wants $90 to do it so it can't be that hard.

 

[5port]

Our cars have direct injection therefore they dont spray gas past the valves. Since gas is not sprayed past the valves the valves tend to get gunk build-up on them. Even using a good cleaner gas like Shell V-power will not clean the valves because they never see the gas. The Dealer is probably offereing this service based on your mileage. If the car is running well I would skip it. I use Shell V-power anyway and hope for the best.

 

[tddvrrn]

I took my car to the dealership for the wiper motor ground wire recall and when they were done they recommended the carbon cleaning procedure for $90.

What is that procedure? Is it needed? Is it easy enough to do it yourself? The dealer wants $90 to do it so it can't be that hard.

i'm not sure what they do. ask some questions. it's probably a fuel induction service. try this: https://www.amazon.com/dp/ (commissions earned)

the only way to really get it clean is to pull off the intake manifold and clean it by hand. but then your valves are still dirty... alas.

 

[MikeHTally]

Our cars have direct injection therefore they dont spray gas past the valves. Since gas is not sprayed past the valves the valves tend to get gunk build-up on them...

From what, air? Don't think so. That's the only thing that passes the intake valves. It's the air/fuel mixture passing the intake valves in a port-injected engine that creates carbon build-up over time. I did a Sea Foam treatment on my Speed about 6K (15 months) ago. Very little smoke. It did help the throttle response a pinch.

 

[MSMS3]

The exhaust gas recirculation system and the PCV system shoot all that crap back into the intake and through the intake valves to be reburned. If you've ever run a catch can on the PCV side and seen the stuff that collects you can have some idea that a lot more than air is going back through those intake valves. If you've ever seen what the inside of our EGR tubes look like after a while, you'll know that that stuff that does not collect inside and block the tubes is doing the same thing to the back side of the intake valves.

 

[RichB]

I'm guessing that they'd clean the EGR system. That is the first thing to get clogged (and cause a CEL) on our engine.