HELP WITH EGR !!! failed emission - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 04-15-2004, 05:17 PM   #21
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jun 2002
Location: Bedroom, Ontario
Posts: 3,266
Thanks: 0
Thanked 0 Times in 0 Posts
Drifter420 is on a distinguished road
Default

Quote:
Originally Posted by jwikoff99
Something makes me think it'* not the O2 sensor. CO is caused by a rich condition, and NOx is caused by a lean condition (extra heat, dissociation and the like). With a bad 02, it seems like you would have more of one, and not the other. Which leads me to the cat. The EGR, I dunno, nor do I know how to diagnose a bad one.

BTW, only the front 02 would have any affect on emissions. The rear just monitors the condition of the cat.
DA WINNA !!!!!
Replaced the cat.. the old one was empty.. nada.. nothing in it.. did the test day after the cat change ( cause they said the Cat needs to work in so couldn't do it then and there ). So I have an empty cat sittin at home waiting to go back on when the emission gets removed 4 years later . Will take pics of the empty cat and upload it this weekend. The bottom end with the new cat is much smoother.. no hiccups/misfire feeling cause of backpressure.. but the top and mid-range is gone.. I don't hit as high of a boost anymore.. but it passed so thats all that matters for now..

Thanx for all the help guys.. I learned a lot bout emission and CO/ NO reading meaning what.. the CO passed by 0.01 so I think I"m running rich, but I think that is contributing maybe by my T-stat.. running 180.. it heats up quick like normal.. but when I drive, it always is @ 1 notch lower then 90C.. and only get that high if I sit and idle for close to 10mins or so..
Drifter420 is offline   Reply With Quote
Old 04-18-2004, 02:54 PM   #22
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jun 2002
Location: Bedroom, Ontario
Posts: 3,266
Thanks: 0
Thanked 0 Times in 0 Posts
Drifter420 is on a distinguished road
Default

wats wrong with my cat?

Drifter420 is offline   Reply With Quote
Old 04-20-2004, 05:19 AM   #23
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

Glad I could be of service!!

Someone did a good job of hollowing that sucker out.
J Wikoff is offline   Reply With Quote
Old 04-20-2004, 04:52 PM   #24
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jun 2002
Location: Bedroom, Ontario
Posts: 3,266
Thanks: 0
Thanked 0 Times in 0 Posts
Drifter420 is on a distinguished road
Default

Well.. yesterday I pulled off a side of a road when I was on a highway ( off ramp then road ) and I had something flying around in my trunk so I went to secure it and notice a smell of rotten eggs. .. if that serves me correct that means a CAT going bad.. but the new one has been on for maybe 2 weeks
When I got home.. I put my nose in the exhaust *cough *cough and didn't smell it.. I wonder if it was going bad.. could it be caused by the fact I had to get on the gas to get up to highway speed ( then pulled off the next off ramp )
I think it could also be cause I'm burning rich cause my car is usually on the mark just before center 90C so it'* roughly about 77.5 C. I don't know what that would be in Faranheit.. but I think that could be causeing some issues.. I'm contemplating on changing the T-stat.. but at the same time with the hot summer coming.. maybe the old shotty T-stat would help keep the car EVEN MORE cooler then a 180 T-stat.. no thrown codes or error coming up that I'm aware of.
Drifter420 is offline   Reply With Quote
Old 04-20-2004, 05:07 PM   #25
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

That smell is often associated with a new cat. It'll go away. I had the same experience.
J Wikoff is offline   Reply With Quote
Old 04-20-2004, 05:57 PM   #26
Senior Member
Certified Car Nut
 
Join Date: Jun 2003
Posts: 15,928
Thanks: 0
Thanked 0 Times in 0 Posts
BonneMeMN is on a distinguished road
Default

You were running rich with no */C and a new cat, so you may have shortened it'* life...
BonneMeMN is offline   Reply With Quote
Old 04-20-2004, 06:47 PM   #27
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jun 2002
Location: Bedroom, Ontario
Posts: 3,266
Thanks: 0
Thanked 0 Times in 0 Posts
Drifter420 is on a distinguished road
Default

Quote:
Originally Posted by BonneMeMN
You were running rich with no */C and a new cat, so you may have shortened it'* life...
No.. The */C has been on for a while.. it probably contributed to my home made honed out CAT ( see pics above ).. when I put the new one on.. the */C was running. I didn't know new CAT was suppose to make that smell.. so I was freakin out thinkin great.. now I got to go back and sit around at the shop for a new CAt.. figuring out how to prevent and if I need to argue about the cat being faulty...

Anyone know the Celcius to Faranheit conversion?? Whats 77.5 Celcius converted to Faranheit? ( Just want to know what My car is running temp is right now
Drifter420 is offline   Reply With Quote
Old 04-20-2004, 06:54 PM   #28
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

171.5

a C = [32 + (9/5)a] F
J Wikoff is offline   Reply With Quote
Old 04-20-2004, 07:54 PM   #29
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jun 2002
Location: Bedroom, Ontario
Posts: 3,266
Thanks: 0
Thanked 0 Times in 0 Posts
Drifter420 is on a distinguished road
Default

Quote:
Originally Posted by jwikoff99
171.5

a C = [32 + (9/5)a] F
Kewl.. thanx.. so my 180 Stat some reason is opening up earlier and or the fact I don't have the bottom rock guard and shield cover is allowing more air to cool down the engine.. humm.. I know there'* discrepency as to wat the optimum range is for the 3800 L67... anyone know wat it is??

I remember before it was around 160-220 F.. but recently reading other posts it says 200-220F. ( which I think is too small of a optimum range )
Drifter420 is offline   Reply With Quote
Old 04-20-2004, 09:47 PM   #30
Senior Member
Posts like a Turbo
 
Join Date: Sep 2003
Location: Halifax Nova Scotia ASE Master Service Tech
Posts: 376
Thanks: 0
Thanked 0 Times in 0 Posts
A Bonnie Canuck is on a distinguished road
Default

Hey, that hollowed out Cat looks just like mine installed in my car (no emission tests in Nova Scotia ) The optimum range in my opinion for this car would be between 185-220 degrees F. Really anything much lower and the computer is going to run rich to warm the engine up and anything hotter...well we know.
A Bonnie Canuck is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Help me 97 bonneville se emission test fail codes HeLP spazinout 1992-1999 1 01-15-2008 12:21 PM
Emission Test Failed! faisalmali 1992-1999 16 04-03-2006 03:46 PM
EGR Emission bigbadbonneville Everything Electrical & Electronic 10 08-17-2005 09:00 PM
EGR low flow. Replaced EGR, still getting code 1997_LeSabre 1992-1999 8 04-20-2005 10:06 AM
bonnie failed the nox in emission test rrrddgy 1992-1999 4 03-01-2004 02:21 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 06:06 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.