I took the Tour into the Dealer last week because the Check Engine light was on. They pulled the code and said an intake runner had stuck and caused the code. They said this happens sometimes, and didn't want to do anything about it. I took it home and yesterday the Check engine light came on again. I figure its probably the same thing even though when I called them they said that they thought it could be something else so I needed to have it in for another diagnostic. I'm taking it in tonight for another check (Free of charge cause I complained long enough).
My question in what causes an intake Runner to stick, and what is involved in the repairs? What all needs to be done etc. I would like to know as much as possible since the car is out of warranty, and I'm sure the dealer is gonna try and shaft me if they can.