Rough idle/running 15 minutes after shutdown - Page 6 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 04-19-2010, 02:45 PM   #51
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

My first thought to reading that you may have solved it with a MAF and IAC is a little skeptical, thinking a bit further though......

The MAP sensor is the actual sensor reading that the change in EGR flow isn't sufficient. The pcm expects to see a certain change with various EGR positions and doesn't. To do this it must be using the MAF airflow info to expect a certain pressure then add the EGR opening to expect a slight change in pressure from what the calculations tell it to expect from the MAF readings.

If the MAF readings are false, then the map will not be able to read properly and potentially give a code for something that isn't actually happening.

Hopefully you got the problem solved.
BillBoost37 is offline   Reply With Quote
Old 04-19-2010, 03:21 PM   #52
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

Good to hear. Think what that woudl have cost you if you had taken it in to a shop.
Danthurs is offline   Reply With Quote
Old 04-19-2010, 08:44 PM   #53
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Sep 2009
Location: NW Ohio
Posts: 114
Thanks: 0
Thanked 0 Times in 0 Posts
Leonardo is on a distinguished road
Default

Quote:
Originally Posted by Danthurs View Post
Good to hear. Think what that woudl have cost you if you had taken it in to a shop.
Well- I still haven't gotten the Beer bill from you and Bill

Like you said Dan, we eliminated all the free and easy stuff. If I had bought parts right at first, you know I'd still be chasing wires and would've re-crimped the problem AFTER the $180.

Leonardo is offline   Reply With Quote
Old 04-19-2010, 08:49 PM   #54
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Sep 2009
Location: NW Ohio
Posts: 114
Thanks: 0
Thanked 0 Times in 0 Posts
Leonardo is on a distinguished road
Default

I'm going to clear the codes again and see what happens- but it was butter smooth the rest of the day. I know I got it now. I do not know that the IAC was bad- I just changed it anyway- I believe it was working fine but I am approaching 98k miles on this black beauty=so gonna have to feed it at some point. Good learning experience for me, but doubt it would help anyone else too much.
Leonardo is offline   Reply With Quote
Old 04-20-2010, 09:52 AM   #55
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Sep 2009
Location: NW Ohio
Posts: 114
Thanks: 0
Thanked 0 Times in 0 Posts
Leonardo is on a distinguished road
Default

Morning update- No SES light, no blips quirks or sniffles.no more sputters- I ran the snot out of it this morning- was running late to work- This black hotrod is humming along!

100% positive she be well again!

I'll call this one a wrap!
Leonardo is offline   Reply With Quote
Old 04-20-2010, 09:46 PM   #56
Senior Member
Posts like a Turbo
 
Tom_Sawyer_Man's Avatar
 
Join Date: Dec 2009
Location: Kitchener On.
Posts: 348
Thanks: 0
Thanked 0 Times in 0 Posts
Tom_Sawyer_Man is on a distinguished road
Default

Hope that all worked out for you. Likely would have cost a small fortune at the shop.
Tom_Sawyer_Man is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1993 LeSabre Idle Rough after Code 18 After Repairs Kimberly Buick 24 06-17-2015 05:25 PM
Running Rough at idle and loss of power with hesitation mhoflin 1992-1999 5 01-24-2009 06:28 PM
runs rough for few minutes after restarting when hot billha 1992-1999 10 12-21-2007 12:28 PM
95 bonne running rough @ idle coffems 1992-1999 9 08-21-2006 10:44 AM
UPDATE - Multiple Cylinder Miss/Running Lean/Rough Idle Daron97SSE 1992-1999 7 05-05-2005 01:24 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 03:38 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.