question about cleaning the throttle body on a sc2?

[Jet]

today I cleaned the throttle body on my wife's 1997 sc2 and when I had it
apart I noticed that there was a black coating all over the throttle body
and into the intake manifold. I sprayed it with carb cleaner to clean it and
got all the black stuff off the throttle body but could not clean the intake
manifold as well. is this black stuff normal or is something wrong with the
car?

 

[Skid]

I've seen this on my car, nothing to worry about, probably a lot of short
trips, and not enough long highway trips.

 

[Napalm Heart]

today I cleaned the throttle body on my wife's 1997 sc2 and when I had it
apart I noticed that there was a black coating all over the throttle body
and into the intake manifold. I sprayed it with carb cleaner to clean it and
got all the black stuff off the throttle body but could not clean the intake
manifold as well. is this black stuff normal or is something wrong with the
car?

You really should use throttle body cleaner rather than carb clean.
The coating is normal. Cleaning the plate does what you need it to.

Ken