Throttle body carbon build-up?

From: Brett Elliott (elliott_brett@hotmail.com)
Date: Wed Nov 15 2000 - 21:27:27 EST

I have a 2000 Dakota with the 4.7l engine that has been behaving poorly
lately. It idles very rough and often dies at stop lights. When I took it to
the Dodge dealer today, they told me that these symptoms where due to carbon
buildup in my throttle body caused by using "bad" gas?

I inspected the TB and there was good amount of carbon. My question is, how
and why does carbon build up in the TB on a Multiport Fuel Injection vehicle
and could it be bad enough to cause the engine to run rough and stall?

As a "bonus" the dealer told me that cleaning the TB wasn't covered under my
warrantee and they would be happy to do it for the modest price of $160.
When I refused to pay this, they informed that I was going to be charged an
hour of labor for the "check-out" and diagnosis the tech did. They ended up
not charging me this "fee" after-all.

Has anyone else had this problem with the throttle body?

Thanks,
        -Brett
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