EGR trouble - 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 06-24-2011, 04:27 PM   #1
Senior Member
Posts like a Supercharger
Thread Starter
 
Join Date: Apr 2011
Location: Pointe-des-Cascades, QC
Posts: 194
Thanks: 0
Thanked 2 Times in 2 Posts
stegarsla is on a distinguished road
Default EGR trouble

I replaced my EGR valve because previous owner put a block-off plate there instead of fixing the problem. Now, car starts well, idles really smooth and have a good throttle response off idle, but it lacks power when in gear. As soon as you take off, it feels like it wants to die.

What could have someone achieved by blocking the EGR passages? Can you cheat another problem with that trick?

It would run pretty well with the block off plate, it was just shaky when hot. Now it doesn't shake but it misfires a bit and feels like it wants to die get going from a stop.

Car is 91 Cadillac brougham d'Élégance with a 5.7L
stegarsla is offline   Reply With Quote
Old 06-24-2011, 04:33 PM   #2
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Check it over for any vacuum leaks.
Danthurs is offline   Reply With Quote
Old 06-24-2011, 04:35 PM   #3
Senior Member
Posts like a Supercharger
Thread Starter
 
Join Date: Apr 2011
Location: Pointe-des-Cascades, QC
Posts: 194
Thanks: 0
Thanked 2 Times in 2 Posts
stegarsla is on a distinguished road
Default

Quote:
Originally Posted by Danthurs View Post
Check it over for any vacuum leaks.
Carb cleaner?
stegarsla is offline   Reply With Quote
Old 06-24-2011, 05:31 PM   #4
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

That'* what I use.
Danthurs is offline   Reply With Quote
Old 06-25-2011, 01:24 AM   #5
Senior Member
Posts like a Supercharger
Thread Starter
 
Join Date: Apr 2011
Location: Pointe-des-Cascades, QC
Posts: 194
Thanks: 0
Thanked 2 Times in 2 Posts
stegarsla is on a distinguished road
Default

thanks, I'll definetly try it
stegarsla is offline   Reply With Quote
Old 07-04-2011, 07:45 PM   #6
Senior Member
Posts like a Supercharger
Thread Starter
 
Join Date: Apr 2011
Location: Pointe-des-Cascades, QC
Posts: 194
Thanks: 0
Thanked 2 Times in 2 Posts
stegarsla is on a distinguished road
Default

I checked and checked and rechecked again, there'* no vacuum leak.

I've checked the controller. The car runs super fine when it'* unplugged. I checked the voltage, there a constant 12V in the connector pins. Is it normal? I'd think not. If not, what causes this? Grounded ECU connection?
stegarsla is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
EGR trouble. irish91983 1992-1999 19 11-03-2007 10:45 AM
my trouble with Trouble Codes 1996 Bonneville SE 1992-1999 8 07-30-2007 11:08 PM
Trouble, trouble, trouble jbmark33 2000-2005 25 05-22-2007 10:11 PM
EGR low flow. Replaced EGR, still getting code 1997_LeSabre 1992-1999 8 04-20-2005 10:06 AM
'95 SSEi EGR valve/O2 sensor replacement Brad_Olson 1992-1999 3 07-21-2002 01:22 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 07:05 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.