So I was just wondering about when I'm running my car and I shift at a high RPM why would their be a poof of black smoke that comes from my exhaust? It's done it for the longest time but I'm guessing it's not hurting anything. I'm just guessing I'm running rich but is there anything I can really do about it on a N/A car??

 

mine does the same, always has really. its carbon buildup poofing out

 

ohhh wow this happen to me...lol i just posted..haha

 

I really never thought as this being a problem but I thought I'd ask anyways!

 

cuz u drive a race car like ricky bobby

 

cause the car is running rich when you tromp on the gas

in my old car i was able to leave to black soot marks on the driveway while my car was warming up

 

when you're shifting you still have spent exhaust gases in your exhaust system. the back-pressure creates a negative vacuum for a quick second til you change the gear. all the trapped exhaust then gets pushed out, the exhaust before and after the shift mix which makes it darker.

if you're blowing out black smoke constantly your motor is toast.

 

The factory ECU likes to make the car run rich up top in the RPM band. If you are running no cats, then you will likely see this.

 

Oh okay that clears up a lot. My car doesn't smoke all the time or much at all only on high RPM shifts. Thanks a lot!

 

^ oh yeah? spamming for 50 posts?

 

yea i saw that in a couple threads i was like wtf

 

Spamming for 50 posts. What are you talking about?? Rose? Do you get a prize at 50 post or something??

 

that actually wasnt for u, was for sum1 else posted after u that but he got banned quickly. once u get 50 posts ur able to sell in the PPC's, and people tend to write just anything to get 50

he wrote "sucks"

 

Oh okay, I was like wtf lol I'm kinda new to this site...what is the PPC??