Code 26 QDM - 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 12-02-2006, 05:14 PM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default Code 26 QDM

This code will be the death of me. It'* transferred from old ECU to new... so I know it'* not the ECU this time. It comes on at 45mph and goes off below 1500RPM. All FSM diagnostics check out. EGR is tested and works properly. However, the cooling fans never come on. At least I've never seen them come on. No idea why this is though, because they come on when checking codes, so the wiring is good. I'm just assuming the code is from the fans not turning on. Anyone else have any experience with this problem? The only other thing I will mention is every once in a while I will get a code22 [TPS], because the TPS sensor is misadjusted to .2v idle 4.1v WOT.
opensourceguy is offline   Reply With Quote
Old 12-03-2006, 01:34 PM   #2
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

Sounds more like you are having issues with the TCC Solenoid.. Nothice if the trans is locking up?

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 12-03-2006, 02:56 PM   #3
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

Yep, locks up every time; right on 48mph

IDK if it helps, but the other thing I noticed is the code only appears in closed loop when the engine is hot.
opensourceguy is offline   Reply With Quote
Old 12-04-2006, 04:14 PM   #4
Senior Member
Certified GM nut
 
Join Date: Feb 2004
Location: CT
Posts: 2,099
Thanks: 0
Thanked 1 Time in 1 Post
SSEBONNE4EVA is on a distinguished road
Default TPS

I would start by adjusting the TPS. Then reset the ECU.
SSEBONNE4EVA is offline   Reply With Quote
Old 12-05-2006, 03:01 PM   #5
Senior Member
Posts like a Corvette
 
Join Date: Jun 2005
Location: Berkeley, IL
Posts: 1,596
Thanks: 0
Thanked 0 Times in 0 Posts
DarkShadow is on a distinguished road
Default

whats your email agian justin? ive got something to send ya.
DarkShadow is offline   Reply With Quote
Old 12-06-2006, 06:05 PM   #6
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

opensourceguy at gmail dot com-ed electrical company

I adjusted the TPS, and reset the ECU. The car now finally idles! It'* still sketchy, but I can live with it. At least it doesn't stall 3 times getting out of my driveway. However the QDM issue is still there. Still no different, and the rare code 22 is gone. I do have a bit more info on the SES light though... on decel it turns off when throttle let off all the way, but turns back on at 35mph. Then once I stop sometimes it will stay on, and sometimes it will go out, about equal either way. But either way once I start accelerating up until 45 it stays off. Any ideas folks?
opensourceguy is offline   Reply With Quote
Old 12-06-2006, 06:42 PM   #7
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

willwren is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1992 buick lesabre code 26 qdm 1 failure gspot32 Buick 14 05-18-2012 11:05 PM
Error Code P1670 QDM questions cspoonts 1992-1999 114 02-05-2010 03:04 PM
Code 26? QDM Error? WTF DrCheeto Oldsmobile 1 10-11-2006 09:56 AM
QDM Fault, what tha? SSE14U24ME 1987-1991 5 03-23-2004 11:38 PM
QDM 640 fixed G2SSEi95 Forced Induction 10 06-04-2003 12:07 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 07:22 AM.


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.