KeeperPA

I think that's what they are going to do to my car on Tuesday when I drop it off.

KeeperPA

Ok dropped the car off this morning. We'll see what they find when they open up. Probably like many of you said already -- carbon buildup?

As a side note. They gave me a Q7 loaner. That thing is BIG.

Xpri

I took my car in last week. They removed the intake manifold and did the cleaning. So far so good, engine misfires when cold are gone, however, still takes a little longer than I remember to start when cold.

KeeperPA

Xpri,

The dealer called and they did the same to my car. One of the cylinders apparently had a lot of gunk and carbon build up. It's been cleaned thoroughly and they've also been testing it for two days at the dealership. So far no more codes or rough idling. I think I'm picking it up tomorrow.

Hopefully that's it. The one thing is that I do at times get gas from this BP gas station that is near my house. I try to use Shell when I can, but perhaps the fuel at this BP may be a bit dirty?

KeeperPA

Got the car back this afternoon. No rough idle or CEL's thus far. Hopefully the cleaning up of cylinder #2 will keep this from happening again as well as getting gas somewhere else.

Xpri

I was using MOBIL quite a bit as the gas station was convenient for the commute, switched to Shell now. Again, so far no more issues although cold start is still a bit variable, sometimes it takes longer than it should to start. There seems to be some correlation between the noise when the door is opened and how well it starts but for now it's to much trouble to go back to the dealer.

KeeperPA

Yeah, I'm going to stick to Shell. I may have to wait a little longer to fill up or go a little bit out of my way, but I'm sticking to it like I used to.

Paul3.2A4avant

Same here, been using Shell for years, even though it is out of my way as well. I filled up outside NYC recently at a Hess station and the CEL came on about a mile later. A couple of tanks of Shell later and the CEL stayed off.

KeeperPA

amazing how crappy some fuels are compared to others. too bad the computers are so "sensitive" to the quality of fuels...

deutschland06a4

99% of the time the 3.2L misfire codes are cause by the CArbon build up on the back of the valves

the poor design on theose engine is that it is direct injection meaning the injector is going directly into the cumbustion chamber like a diesel....

so using a certain gas is not helping this perticular problem.

bc the injectors are not spray fuel throught the intake manifold it is not cleaning the back of the valve. thus creating "gunk" on the back of the valves. causing a lazy valve which throws a missfire code!

i will take a picture of one when we get it in the shop ive personally cleaned out 4 in the last month 3 in 2 weeks.