87 Bonneville EGR Code - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 06-26-2007, 01:23 PM   #1
Junior Member
Thread Starter
 
Join Date: Jun 2007
Location: North Vancouver, BC, Canada
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
forexcdn is on a distinguished road
Default 87 Bonneville EGR Code

My 87 LE runs great, but after 20 mins of driving each day, the 'check engine' light comes on. Code reader says it'* the EGR, but the car just passed the 'Air Care' test here in British Columbia.

I get about 350km per tank in mostly city driving, but sometimes when at idle, the exhaust smells somewhat like paint thinner.

Anyone know if this is a big issue? Thank you.
forexcdn is offline   Reply With Quote
Old 06-26-2007, 01:31 PM   #2
Junior Member
 
Join Date: Apr 2006
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
Bonneville92V688 is on a distinguished road
Default

Since you have the older 3.8 LG3, you will have a vacuum powered EGR valve. If you can, pull the vacuum hose on the top of the EGR valve (its the round thing behind the throttle body), and up under the valve you will feel something similar to a bellows. Press that up into the valve, and put your finger over the vacuum line fitting. It should hold the vacuum. If not, it needs replaced. Sorry if the instructions seem confusing, as I have never worked with that particular 3.8. If it does hold the vacuum, check your vacuum lines, if they are ok, you will most likely need to clean the passages under the valve or replace the solenoid for it.
Bonneville92V688 is offline   Reply With Quote
Old 06-26-2007, 01:35 PM   #3
Junior Member
 
Join Date: Apr 2006
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
Bonneville92V688 is on a distinguished road
Default

Actually I just noticed that the EGR may have holes too small on the bottom to stick your fingers through, so testing it will have to be done with a vacuum pump.
Bonneville92V688 is offline   Reply With Quote
Old 06-26-2007, 01:44 PM   #4
Junior Member
Thread Starter
 
Join Date: Jun 2007
Location: North Vancouver, BC, Canada
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
forexcdn is on a distinguished road
Default Thank you William

I appreciate your help, and I will do as you suggest.

Do you think that would account for the strange exhaust smell? Also, is 350km / 220miles per tank a pathetic gas mileage number?
forexcdn is offline   Reply With Quote
Old 06-26-2007, 01:46 PM   #5
Junior Member
 
Join Date: Mar 2004
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
harofreak00 is on a distinguished road
Default

yes, 220 is pathetic, a properly tuned car should be getting double that. when was your last tuneup?
harofreak00 is offline   Reply With Quote
Old 06-26-2007, 07:14 PM   #6
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2006
Location: Sweden
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
Kisen is on a distinguished road
Default

Is there a vacuum powered EGR on my .89 SSE?

Anyone know where all the shortwords are? Like EGR =) I know its a list somewhere on the forum.


//kisen
Kisen is offline   Reply With Quote
Old 06-27-2007, 01:09 AM   #7
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

The EGR on the 87 is controlled with vacume, but its done with a solenoid.... I have seen either or go bad..

Check the EGR first..

For the other post,

EGR is Exhaust Gas Recirculation

and no, you have a Digital EGR... Totally Electrical

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 06-27-2007, 01:16 AM   #8
Junior Member
 
Join Date: Aug 2005
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
wjcollier07 is on a distinguished road
Default

definitely check your maintenance schedule. she probably just needs a tune up, my friend'* old 87 used to avg about 24 mpg, your mileage is definitely not lookin good. Definitely do one if you don't know when the last time one was done. Low cost solution to bad fuel economy.
wjcollier07 is offline   Reply With Quote
Old 06-27-2007, 09:24 AM   #9
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

These LG3'* had a lot of EGR and MAF issues... Most likely needs an O2 sensor as well

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 06-27-2007, 09:17 PM   #10
Junior Member
 
Join Date: May 2006
Location: BonnevilleHell
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
clm2112 is on a distinguished road
Default

Quote:
Originally Posted by jr's3800
These LG3'* had a lot of EGR and MAF issues... Most likely needs an O2 sensor as well
Just out of curiosity, does the EGR on the LG3 have a feedback circuit as well?

On some of the other GM vac operated EGR valves, there'* a sensor on the base of the valve. Hot exaust gas passing through the open valve heats the sensor, closes the circuit, and tells the ECM that the EGR valve is actually functioning. If so, I'd check that wire as well for being burnt and blistered (no reading on the sensor due to an open circuit on the wire can trip an EGR code...at least it can on the 3rd gen F-body)
clm2112 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1991 SSE - code 28 code 39 code 42 - losing sleep labonnita 1987-1991 9 12-26-2009 10:58 PM
EGR low flow. Replaced EGR, still getting code 1997_LeSabre 1992-1999 8 04-20-2005 10:06 AM
Code 1404 EGR Help please....? Black bonneville 2000-2005 1 05-24-2004 03:45 PM
code 32: EGR system / '90 6000 LE SSEi95 Pontiac 5 06-16-2003 11:39 PM
406 EGR Pintle Position code sterdeus 1992-1999 8 06-02-2003 01:27 AM


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 12:32 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.