1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

rough idle

Thread Tools
 
Search this Thread
 
Old 03-09-2006 | 03:40 PM
  #11  
LakevilleSSEi's Avatar
Senior Member
True Car Nut
 
Joined: Sep 2004
Posts: 9,130
Likes: 0
From: Farmington, Minnesota =MWBF '05 SURVIVOR= =CEBF '06 SURVIVOR= =August '06 COTM=
LakevilleSSEi is on a distinguished road
Default

Originally Posted by BillBoost37
Nate...did you ever do gears and chain?
I've never had the motor tore that far down.
Old 03-10-2006 | 07:30 AM
  #12  
lash's Avatar
Senior Member
True Car Nut
 
Joined: Oct 2005
Posts: 7,030
Likes: 2
From: Central Florida
lash is on a distinguished road
Default

I just happened to be reading some things last night and happened on this exact problem and some possible fixes.

Now I have no idea what each of you have tried, but some recommended diagnistics are:

Check or replace fuel filter,

If problem persists, do a fuel pressure test, as car may be running lean.

Also, interestingly, it was mentioned that a car that has been running lean for a long time may have a damaged catalytic converter, form the excessive heat caused by running lean.
Old 03-10-2006 | 07:48 AM
  #13  
BillBoost37's Avatar
DINOSAURUS BOOSTUS

Expert Gearhead
 
Joined: Mar 2005
Posts: 41,391
Likes: 15
From: Enfield, CT
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

I know Nate changed the cat a while back when the old one ran off to chase a mouse.

You guys have checked the vacuum lines and all that happy stuff? My 95 was always a little rough on idle...I figured it was part of the car. Never found anything.
Old 03-10-2006 | 11:58 AM
  #14  
maxpower9004's Avatar
Senior Member
Posts like a Supercharger
 
Joined: Apr 2004
Posts: 171
Likes: 0
From: Providence, RI
maxpower9004 is on a distinguished road
Default

I have the same problem in my 92se. When it idles rough though, the voltage gauge and sometimes the oil pressure gauge flucuate slightly, sort of in tune with the roughness, if that makes any sense. I recently had my water pump fail, which in turn shredded my belt, and the idle seemed to be smooth for a few days after. Also, sometimes when its rough, I can see the idle tensioner pully move a little bit. There was a post on here a while back where some guy repacked his bearings, and that made the pully smoother. I tried to do it, but I couldnt get the pully off.
Old 03-10-2006 | 12:12 PM
  #15  
slow_azz92bonne's Avatar
Senior Member
Posts like a 4 Banger
 
Joined: Jul 2005
Posts: 121
Likes: 0
From: Esmond, IL
slow_azz92bonne is on a distinguished road
Default

well i know nate is aware of my cam sensor issue on my old 92 SE when my cam sensor started to go out it would idle rough at higher temps but fine cold so i had to disect the whole timing chain cover to get the magnet out of the cam gear and while i did this i got new cam+crank gears, chain, the chain tensionor, the magnet that is mounted in the cam gear, the cam sensor that is mounted on the outside of the case, the oil pressure sender unit, and crank sensor. since then my brother drives the car and for the 12000 miles added after that project we have no problems with hesitation or idle problems.
but that is not to say that is any of your guys problems
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
randman1
1992-1999
25
09-07-2004 08:20 PM
GTP2SSEi
General GM Chat
2
07-29-2003 12:46 PM
laquintaman2003
1992-1999
8
01-04-2003 12:59 PM
billha
1992-1999
18
11-14-2002 11:06 AM
columbusbonne
1992-1999
11
11-04-2002 01:23 PM



Quick Reply: rough idle



All times are GMT -4. The time now is 01:32 PM.