Exhaust stink

[Mike Rolica]

Read what I said!   Improper operating egr!!!  Yes h2so4 is  the smell and
is usually due to high combustion temperatures & excess fuel!  Which can be
because of improper operation of egr Cyl combustion temps, or combustion in
cat converter.   Have you ever been behind buddy who is got his car floored?
Smells like eggs too.  I.e. PE mode.  You never smell that on startup, just
after the engine is warm i.e. cat no yet lit.
No cat on my winter beater, (84 olds cutlass 305) but smelled like rotten
eggs.  Egr was closed all the time  Results in higher combustion temps, when
it is supposed to be operating.  I was just saying that  idle= cat convert
from rich condition at idle (cat is trying too burn off excess fuel)  WOT/
part t  egr not opening
(if applicable) and also cat.    Cat equipped cars will always smell a
little like eggs.  The reduce nox's and hydrocarbons but h2so4 increases!
Mike Rolica
EXT. 260
 :-)


	-----Original Message-----
	From:	Programmer [SMTP:nwester at eidnet.org]
	Sent:	Monday, November 01, 1999 10:36 AM
	To:	gmecm at efi332.eng.ohio-state.edu
	Subject:	Re: Exhaust stink

	Mike,

	EGR isn't normally on at idle...H2SO4 is usually the combo output
and the
	resultant smell...I've heard everything from running too rich, to
low nickel
	content in converter, to sulphur content in fuel...everyone's a
little vague
	on actual "cause".

	Lyndon.
	-----Original Message-----
	From: Mike Rolica <mrolica at meridian-mag.com>
	To: 'gmecm at efi332.eng.ohio-state.edu'
<gmecm at efi332.eng.ohio-state.edu>
	Date: November 1, 1999 6:51 AM
	Subject: RE: Exhaust stink


	>That rotten egg smell? Like sulphery ?  On old mans 94 FS chev,
Runing rich
	>and inproper operation of egr can do it.
	>Mike Rolica
	>EXT. 260
	> :-)
	>
	>
	> -----Original Message-----
	> From: Geoff Richards [SMTP:geoffsue at one.net.au]
	> Sent: Saturday, October 30, 1999 6:26 AM
	> To: gmecm at efi332.eng.ohio-state.edu
	> Subject: Exhaust stink
	>
	> Whats the reason some vehicles STINK from unleaded fuel / cat
	> convertors and others don't
	> Geoff
	>