I have a lot of carbon build up on the inside of my tail pipe is this normal, also as my car is parked back against a garage door large black patches of carbon is left on the door only on start up , had emissions tested thats ok, i have a my00 standard turbo 2000 .

 

Dont worry.. thats completely normal.. scoobs run very rich out of the box which is what causes the blackening of the tailpipe

 

Also, running unleaded you won't get a white tailpipe as you used to with leaded fuels.

 

Thanks guys