Rough Idle - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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.

Reply
 
 
 
Thread Tools Search this Thread
Old 12-08-2005, 11:58 AM   #11
Senior Member
True Car Nut
 
Join Date: Oct 2005
Location: Central Florida
Posts: 7,030
Thanks: 0
Thanked 0 Times in 0 Posts
lash is on a distinguished road
Default

Quote:
Originally Posted by Jim W
My 94 just started doing this today. At lunch it took a few seconds for the car to get started (cold). Then it was idling really lousy and nearly stalled. I revved in N a bit to get er back going.

Just now my SES light went on. Idle is better in drive, but really noticeable in park.

taking it in tomorrow.
That'* exactly how mine acted just before I ended up replacing the Upper Intake and the lower intake gasket...But I know that everyone here knows about this and checks their coolant levels regularly, so I would guess that is not your problem.
lash is offline   Reply With Quote
Old 12-08-2005, 12:07 PM   #12
Junior Member
 
Join Date: Mar 2003
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
vital49 is on a distinguished road
Default

Quote:
Originally Posted by lash
Quote:
Originally Posted by Jim W
My 94 just started doing this today. At lunch it took a few seconds for the car to get started (cold). Then it was idling really lousy and nearly stalled. I revved in N a bit to get er back going.

Just now my SES light went on. Idle is better in drive, but really noticeable in park.

taking it in tomorrow.
That'* exactly how mine acted just before I ended up replacing the Upper Intake and the lower intake gasket...But I know that everyone here knows about this and checks their coolant levels regularly, so I would guess that is not your problem.
You have a completely different engine and PCM. Your advice isn't really sound.
vital49 is offline   Reply With Quote
Old 12-08-2005, 12:34 PM   #13
Senior Member
True Car Nut
 
Join Date: Oct 2005
Location: Central Florida
Posts: 7,030
Thanks: 0
Thanked 0 Times in 0 Posts
lash is on a distinguished road
Default

O......K.......

Wasn't really advice as much as comment...

But anyway, yup, missed looking at his sig.
lash is offline   Reply With Quote
Old 12-08-2005, 02:01 PM   #14
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 fuel

My 96 did this a few years back. It was water in the fuel.
gas dryer fixxed it right up and she'* run like a charm since.
SSEBONNE4EVA is offline   Reply With Quote
Old 12-08-2005, 02:31 PM   #15
Senior Member
Expert Gearhead
 
Join Date: Dec 2002
Location: Mississauga, Ontario
Posts: 20,892
Thanks: 0
Thanked 1 Time in 1 Post
Jim W is on a distinguished road
Default

Evidently rough idle can lead to a lot of things.

Since the SES came on, the car shifts from P to R rather roughly, and a loooow speeds (ie traffic crawl) the shifting was a bit harsh. As speed it shifts just fine. When I come to a stop in the drive gear, I get the pattern of surging/rough idle.

The Boost gage wavers a bit as well.

I tend to think its a vacuum problem somewhere.

I should hear from them shortly.

*edit* I called, apparently is the intake manifold gasket, they are removing the blower and I am await a call back.
Jim W is offline   Reply With Quote
Old 12-08-2005, 05:01 PM   #16
Senior Member
True Car Nut
 
Join Date: Oct 2005
Location: Central Florida
Posts: 7,030
Thanks: 0
Thanked 0 Times in 0 Posts
lash is on a distinguished road
Default

Quote:
Originally Posted by Jim W
I called, apparently is the intake manifold gasket, they are removing the blower and I am await a call back.
Hmmmmm.....

Maybe I wasn't that far off after all...
lash is offline   Reply With Quote
Old 12-08-2005, 05:32 PM   #17
Senior Member
Expert Gearhead
 
Join Date: Dec 2002
Location: Mississauga, Ontario
Posts: 20,892
Thanks: 0
Thanked 1 Time in 1 Post
Jim W is on a distinguished road
Default

Yes, its both the upper and lower intake gaskets. They are sucking in air, causing that vac problem I mentioned.

Good news is no oil or coolant leakage.

Bad news....5 hrs labour...Merry Christmas
Jim W is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
From rough idle to high idle randman1 1992-1999 25 09-07-2004 09:20 PM
'00SSEi:rough idle,high idle...Please Help.... GTP2SSEi General GM Chat 2 07-29-2003 01:46 PM
rough idle only in drive laquintaman2003 1992-1999 10 01-04-2003 01:59 PM
rough idle billha 1992-1999 19 11-14-2002 03:59 PM
Rough idle problem. columbusbonne 1992-1999 14 11-04-2002 11:12 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 01:35 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.