Intermittent SES, more commonly downhill. - 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 10-05-2007, 02:20 PM   #1
Junior Member
Thread Starter
 
Join Date: Aug 2005
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
wjcollier07 is on a distinguished road
Default Intermittent SES, more commonly downhill.

89 LE. SES coming on intermittently, more commonly downhill. Does not affect performance or mileage so far. Been happening for the past 50k miles. Car now has 392k. Storing no codes.
wjcollier07 is offline   Reply With Quote
Old 10-05-2007, 02:56 PM   #2
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

If its storing no codes it sounds like the ECM is farting

Not bad yet.. Just getting age.. Freaky..

Isn't there a relay for the SES light?

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 10-05-2007, 03:24 PM   #3
Junior Member
Thread Starter
 
Join Date: Aug 2005
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
wjcollier07 is on a distinguished road
Default

Hmmm. Well my Cutlass Ciera used to do the same exact thing. It once stalled at the bottom of a hill after doing it...and wouldn't run. Then for no reason it started up and I SCOOTED it up the other hill WOT

So no advisory?
wjcollier07 is offline   Reply With Quote
Old 10-06-2007, 12:11 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 lights

Intermitten lights could be caused by bad electrical connections, battery, grounds, or sensors. Try cleaning them first, then check your TPS voltage at idle position. Going down hill it is in this position and if the voltage is off, it will effect timing and fuel setting a light temporarily.
SSEBONNE4EVA is offline   Reply With Quote
Old 10-08-2007, 05:50 PM   #5
Senior Member
Posts like a Turbo
 
Join Date: May 2003
Location: San Diego, CA
Posts: 203
Thanks: 0
Thanked 0 Times in 0 Posts
grey3800 is on a distinguished road
Default

Dont know if this helps but my SES light would turn on and off periodically with no codes, later i discover i could make it do this if i was slowing down and very lightly applied the brakes. It go away after 15-20 minutes.

I guessed it had something to do with the EGR valve not lowering the rpm enough, since it engadges with brakes on. (i could be wrong)
grey3800 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Intermittent SES now the cruise wont work mrbell83 1992-1999 38 10-10-2006 02:00 PM
did bonnevilles go downhill from 95-96? NERV General GM Chat 24 01-31-2005 02:23 AM
what oil filter do you guys commonly use? mkaake 1992-1999 30 08-22-2004 10:45 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 01:52 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.