carbon build up

[chrismillion]

what causes this stuff in my tailpipes? how do i make it stop?

 

[95GTvert[bv12]]

running rich...it happens to me too....you probly need a tune up i know i do but i am waiting to install my turob next month.

 

[gcomfx.com]

Yup, rich. When you run tuned for nitrous all the time like I do.... it's just going to happen.