Black spray out exhaust

[Eclipse98_RS]

I have no clue what this is. I have a failed sensor that keeps warm up enrichment off. My car runs really rough when I first start it, then you can physically hear and feel it get in the stoich zone where its supposed to be. My question is I have this black spray on the concrete right by where my exhaust sits. Probably about 2 feet long. It isnt oil, because it doesnt leave any streaks when you try and clean it up. Could this just be a carbon buildup in my muffler? Its dark out right now but tomorrow I will get a pic to show you exactly what it looks like. Its little black dots in a spray pattern.

 

[Loewen21]

That's from your car running much too rich. Thats the extra fuel that doesn't get fully combusted. Common during warm up.

 

[Eclipse98_RS]

Kinda figured that. Thanks for the headsup

 

[Cs4g63]

Just make sure you dont park it in a friends driveway. I parked mine when it was doing that in my Cousins driveway and needless to say he was a little pissed after I left. Funny as hell for me though.

 

[blackGSX2g]

Most of that is just condensation picking up soot from your exhaust pipes. Every DSM with an aftermarket exhaust that I've seen has done that to some extent. There is a nice black spot on my garage door from when I accidentally fired it up and revved it with the garage door closed.

 

[viprez586]

Hahah yep, ive had people yell at me for leaving black spots. Just use a little simple green to clean it up