My rear bumper always gets dirty from the exhaust smoke. My cars runs a little rich and can never keep it clean. If anyone has a fix for this I tried special wax and nothing seems to work. If anyone has a remedy please let me know.

 

Is it all motor? Nothing really you can do but to clean it all the time, that's what I do, but runnin' turbo on 1000cc injectors. Try not to make it run rich, just robbin' horsepower.

 

Thats all its doing hah. Maybe time to get it retuned. Do you have that same problem?

 

I know I'm runnin on the rich side, I tuned it during the summer around 90 degrees, my plugs are always black. Don't really like this tune too much. Time to retune also.