1995 Bonneville SSEi Supercharged, Irratic idle - 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 11-09-2011, 10:00 AM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Nov 2010
Posts: 53
Thanks: 0
Thanked 0 Times in 0 Posts
vektron75 is on a distinguished road
Default 1995 Bonneville SSEi Supercharged, Irratic idle

The car warm or cold will not idle at one speed. When i first start it cold it will idle up to around 1800rpm'* or so and then when it should drop to normal idle speed of about 1000rpm'* it keeps going down and almost stalls and then it will idle up again and down again and never stays at the same rpm'*. Once it is warm I can stop for a light and the idle will drop to about 800rpm'* or so and almost stall. When I stop for a light the idle does not race it just drops. It may not race because I have it in drive.
I have recently replaced MAF, Ignition control module, plugs, wires, 02 sensor, coil packs, IAC valve and about two years ago the EGR valve.
I was having vacuum leak issues with the EGR tube, but I believe they are taken care of.
When the idle drops you can smell it chocking out, runs rich.
vektron75 is offline   Reply With Quote
Old 11-11-2011, 12:02 AM   #2
Senior Member
Posts like a Turbo
 
Join Date: Jun 2009
Posts: 363
Thanks: 0
Thanked 0 Times in 0 Posts
kparrent is on a distinguished road
Default

When I had these problems it was my egr valve. I know you said you replaced it, but might be worth checking for a clog or other similar issue. Check for vacuum leaks also. Spray some TB cleaner around your lines and see if it affects your idle.

Have you checked fuel filter / fuel pressure? I don't think this would be the cause, but never hurts to check
kparrent is offline   Reply With Quote
Old 11-11-2011, 10:34 AM   #3
Senior Member

True Car Nut
 
sseidriver97's Avatar
 
Join Date: Mar 2010
Location: Portage mi
Posts: 7,124
Thanked 3 Times in 3 Posts
sseidriver97 is on a distinguished road
Default

Check for vaccum leaks.Pull your IAC and clean it..and maybe even test your MAf senso
sseidriver97 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
rough idle 1995 Bonneville vektron1961 1992-1999 15 05-15-2011 03:53 PM
1995 Bonneville SSEi SuperCharged HenOra 1992-1999 2 03-15-2010 10:29 AM
1995 Pontiac Bonneville SE vs 1995 Dodge Avenger ES killer_cr80r General GM Chat 30 03-28-2004 04:15 AM
From non-supercharged to supercharged big_boss2010 1992-1999 4 09-06-2003 03:24 AM
1995 SSEI SUPERCHARGED INTAKE MANIFOLD salmanman 1992-1999 1 07-23-2003 03:52 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 09:04 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.