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gschroeder78
03-30-2002, 02:37 PM
I put my N1 Dual exhaust on the other day and now I noticed that not only are the inside of the tips black but there is also black (soot) on the bumper above the tips. Kinda reminds me of a deisel car.

So I'm told this means I'm running rich so where do I adjust this? and how do I know when it's adjusted right?

Thanks guys
S13Grl
03-30-2002, 02:43 PM
Get a SAFC <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

You can't manually adjust your air/fuel ratio.
gschroeder78
03-30-2002, 02:45 PM
So is this normal? If not, what would cause it?
S13Grl
03-30-2002, 03:11 PM
I have personally never heard of it.

You should keep in mind that new exhaust come internally coated with a certain kind of material that burns with hot temperature and causes a burning odor and smoke to appear. That could also be it. My old GReddy SP was greasy inside when I just got it (stainless steel) and it gave out smoke as it burnt, but it never left any residue on my bumper...

And I really don't know what is it that they coat them with and what its purpose is.
William
03-30-2002, 03:16 PM
just a thought, that same residue appeared on my car when I was burning oil. &nbsp;This could just be a bad coincidence... &nbsp;You didn't do anything stupid with your O2 sensor lately did you?
gschroeder78
03-30-2002, 03:20 PM
I haven't touched the o2 sensors but I did replace spark plugs, fuel filter and pcv valve. The exhaust is only a week old and I did know about the burning residue because I had the same thing with my Greddy SP on my Z32.
transient
03-30-2002, 07:29 PM
Yeah, mine smelled like ass for the first day or two. Then again, it was probably mixing with the smell of my burned out clutch <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'>

Anyway, If you're running rich, I'd check O2 sensors. Other than that, you could always run a spark plug to the tailpipe and shoot some flames out of their. Fast and furious baby, hahahaha.

Oh, one thing I forgot... does your car backfire? That's one way you might be able to tell whether it's running rich or just the coating on the inside of the exhaust burning off.