nassty rotten egg smell - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sporty240 · 08-09-2002, 09:16 AM

recently every time I stomp on it, there's that horrible smell, and  the longer I race it (going through multiple gears and farther towards redline) the worse it gets.   it's since I popped on my bosal brospeed 247-111 muffler I think (keeping with stock exhaust piping though). Maybe outlets are too wide and there's an improper mixture? That's what I've heard - rotten egg smell is not from the cat (a common misconception) but from improper mixture. Please any help thanx

-Ben  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/sad.gif" border="0" valign="absmiddle" alt='

'>

uiuc240 · 08-09-2002, 10:22 AM

that's normal.  well at least normal for a 240.  when you floor it, the ECU goes full rich and dumps fuel throught the injectors.  this is too rich for the cat to effectively catalyze, and you are left with a sulfurous odor.  it should go away in a short while of "normal" driving again.  if you get a high-flow cat, this should help a bit.

Eric

240 2NR · 08-09-2002, 10:31 AM

I've found mine only does that when the cat hasn't warmed up fully, like WOT up the on ramp a mile from work if I don't catch any red lights.

uiuc240 · 08-09-2002, 10:45 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (240 2NR @ Aug. 09 2002,11:31)</td></tr><tr><td id="QUOTE">I've found mine only does that when the cat hasn't warmed up fully, like WOT up the on ramp a mile from work if I don't catch any red lights.</td></tr></table><span id='postcolor'>
makes even more sense.  cat isn't ready to go yet and therefore can't do it's job.  perfect.  thanks steve-o

Eric

240 2NR · 08-09-2002, 12:50 PM

no problem-o

240 2NR · 08-09-2002, 12:52 PM

uiuc240 · 08-09-2002, 01:04 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (240 2NR @ Aug. 09 2002,1:52)</td></tr><tr><td id="QUOTE"><img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/butbut.gif" border="0" valign="absmiddle" alt=':but:'> "Give her my o face, <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/butbut.gif" border="0" valign="absmiddle" alt=':but:'> , <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/butbut.gif" border="0" valign="absmiddle" alt=':but:'> , <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/butbut.gif" border="0" valign="absmiddle" alt=':but:'></td></tr></table><span id='postcolor'>
Hey, Peter, man!!!  Turn on Channel 9!!  It's the breast exam!!

<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/hehe.gif" border="0" valign="absmiddle" alt=':hehe:'>  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/hehe.gif" border="0" valign="absmiddle" alt=':hehe:'>

GotDriftS14 · 08-10-2002, 03:14 PM

f#*kin' A peter, f$#kin' A...

<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/cool.gif" border="0" valign="absmiddle" alt='

'>

08-09-2002, 09:16 AM	#1
sporty240 Join Date: Jul 2002 Posts: 22 Trader Rating: (0) Feedback Score: 0 reviews	recently every time I stomp on it, there's that horrible smell, and  the longer I race it (going through multiple gears and farther towards redline) the worse it gets.   it's since I popped on my bosal brospeed 247-111 muffler I think (keeping with stock exhaust piping though). Maybe outlets are too wide and there's an improper mixture? That's what I've heard - rotten egg smell is not from the cat (a common misconception) but from improper mixture. Please any help thanx -Ben  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/sad.gif" border="0" valign="absmiddle" alt=''> __________________ '92 S13 tuned by Team Auto Expressions Performance --------------------------------------------------- Injen CAI Tornado NGK Wires PDM Strut brace Bosal Brospeed muffler Eibach Sportlines Tokicos Kenwood receiver/Kappa speakers/Thunder8000

08-09-2002, 10:22 AM	#2
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	that's normal.  well at least normal for a 240.  when you floor it, the ECU goes full rich and dumps fuel throught the injectors.  this is too rich for the cat to effectively catalyze, and you are left with a sulfurous odor.  it should go away in a short while of "normal" driving again.  if you get a high-flow cat, this should help a bit. Eric __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

08-09-2002, 10:31 AM	#3
240 2NR Zilvia FREAK! Join Date: Dec 2001 Location: Denver Posts: 1,131 Trader Rating: (0) Feedback Score: 0 reviews	I've found mine only does that when the cat hasn't warmed up fully, like WOT up the on ramp a mile from work if I don't catch any red lights. __________________ Steve 93 240sx FB currently very clean and for sale

08-09-2002, 10:45 AM	#4
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (240 2NR @ Aug. 09 2002,11:31)</td></tr><tr><td id="QUOTE">I've found mine only does that when the cat hasn't warmed up fully, like WOT up the on ramp a mile from work if I don't catch any red lights.</td></tr></table><span id='postcolor'> makes even more sense.  cat isn't ready to go yet and therefore can't do it's job.  perfect.  thanks steve-o Eric __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

08-09-2002, 12:50 PM	#5
240 2NR Zilvia FREAK! Join Date: Dec 2001 Location: Denver Posts: 1,131 Trader Rating: (0) Feedback Score: 0 reviews	no problem-o __________________ Steve 93 240sx FB currently very clean and for sale

08-09-2002, 12:52 PM	#6
240 2NR Zilvia FREAK! Join Date: Dec 2001 Location: Denver Posts: 1,131 Trader Rating: (0) Feedback Score: 0 reviews	<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/butbut.gif" border="0" valign="absmiddle" alt=':but:'> "Give her my o face, <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/butbut.gif" border="0" valign="absmiddle" alt=':but:'> , <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/butbut.gif" border="0" valign="absmiddle" alt=':but:'> , <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/butbut.gif" border="0" valign="absmiddle" alt=':but:'> __________________ Steve 93 240sx FB currently very clean and for sale

08-09-2002, 01:04 PM	#7
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (240 2NR @ Aug. 09 2002,1:52)</td></tr><tr><td id="QUOTE"><img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/butbut.gif" border="0" valign="absmiddle" alt=':but:'> "Give her my o face, <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/butbut.gif" border="0" valign="absmiddle" alt=':but:'> , <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/butbut.gif" border="0" valign="absmiddle" alt=':but:'> , <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/butbut.gif" border="0" valign="absmiddle" alt=':but:'></td></tr></table><span id='postcolor'> Hey, Peter, man!!!  Turn on Channel 9!!  It's the breast exam!! <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/hehe.gif" border="0" valign="absmiddle" alt=':hehe:'>  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/hehe.gif" border="0" valign="absmiddle" alt=':hehe:'> __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

08-10-2002, 03:14 PM	#8
GotDriftS14 Zilvia Junkie Join Date: Dec 2001 Location: San Jose Age: 42 Posts: 556 Trader Rating: (0) Feedback Score: 0 reviews	f#*kin' A peter, f$#kin' A... <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/cool.gif" border="0" valign="absmiddle" alt=''> __________________

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