rough idle and other things... - 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 10-04-2004, 01:20 PM   #11
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

Gordy, if you're getting a ST or LT lean, it'* not a misfire.

I'd go with the pump or FPR, possibility of IAC (dirty). Crud stuck in there not allowing it to meter right, allowing too much air at idle, and upsetting the AFR. I think both these MN Bonnevilles could use a thorough scrubbing of the TB.
willwren is offline   Reply With Quote
Old 10-04-2004, 01:23 PM   #12
Senior Member
True Car Nut
 
Join Date: Sep 2004
Location: Farmington, Minnesota =MWBF '05 SURVIVOR= =CEBF '06 SURVIVOR= =August '06 COTM=
Posts: 9,130
Thanks: 0
Thanked 0 Times in 0 Posts
LakevilleSSEi is on a distinguished road
Default

I dunno.....Clean the IAC, change the FPR and filter, Clean TB and MAF, and think and hope (fingers crossed) that it goes away. I get paid on Friday so hopefully I'll be able to get it all cleaned up and runnig correctly so I won't be wastin my time at rock falls this weekend with BonneMe and blue eyes
LakevilleSSEi is offline   Reply With Quote
Old 10-04-2004, 01:46 PM   #13
Senior Member
Certified GM nut
 
Join Date: Feb 2003
Location: Georgia
Posts: 2,095
Thanks: 0
Thanked 0 Times in 0 Posts
DrJay is on a distinguished road
Default

Quote:
Originally Posted by LakevilleSSEi
I know that I need one because when the car is warm it won't restart with out cranking it for almost 20 seconds. And when the car is cold, after sitting all night or something, it will fire right up. Or if the car is warm and only been off for like 5 min, it will fire right up but otherwise it won't. I figure that it could contribute to my lean code and my idle problem. Except my idle'* so rough that it'* like my car is cam'd and jolts the whole car. A couple of times it'* actually rolled the car forward.
I would save your money and "borrow" a fuel pressure gauge.


HARD STARTING WHEN HOT "If your engine cranks for a long time before it fires up when hot, but starts fine when it'* cold, you may have a leaking check valve in the fuel pump. In order to start immediately, fuel needs to remain in the fuel lines. A faulty fuel pump check valve will allow the fuel to flow back into the gas tank leaving the air in the fuel lines. When you attempt to start the car, all the fuel lines need to be filled first to build up enough pressure to start injecting. This takes especially long when the engine is hot since the injection system runs leaner when hot. Find out if the fuel pump check valve is the problem by getting someone to clamp the rubber fuel line to stop the flow of fuel on the engine side of the fuel pump right when you turn off the engine. Wait 20 minutes, have your friend remove the clamp and immediately try to start your car. If it starts up right away, it'* the check valve and time for a new pump."
DrJay is offline   Reply With Quote
Old 10-04-2004, 01:49 PM   #14
Senior Member
Certified GM nut
 
Join Date: Feb 2003
Location: Georgia
Posts: 2,095
Thanks: 0
Thanked 0 Times in 0 Posts
DrJay is on a distinguished road
Default

Quote:
Originally Posted by willwren
Gordy, if you're getting a ST or LT lean, it'* not a misfire.

I'd go with the pump or FPR, possibility of IAC (dirty). Crud stuck in there not allowing it to meter right, allowing too much air at idle, and upsetting the AFR. I think both these MN Bonnevilles could use a thorough scrubbing of the TB.
Everyone could use a TB scrubbing ...I forgot to mention I also cleaned the heck out of my IAC with no improvement
DrJay is offline   Reply With Quote
Old 10-04-2004, 02:02 PM   #15
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

Wasn't yours clean after the rebuild?

Most of the cars here have never been cleaned. Mine was NASTY at 70k with a vast improvement in idle quality. I just did it again at 105k with the same results.
willwren is offline   Reply With Quote
Old 10-04-2004, 02:18 PM   #16
Senior Member
Certified GM nut
 
Join Date: Feb 2003
Location: Georgia
Posts: 2,095
Thanks: 0
Thanked 0 Times in 0 Posts
DrJay is on a distinguished road
Default

Yes and no, to the extent that it wasen't caked on but not a lot of time was taken to shave off the sealed on stuff.
DrJay is offline   Reply With Quote
Old 10-04-2004, 02:45 PM   #17
Senior Member
True Car Nut
 
Join Date: Sep 2004
Location: Farmington, Minnesota =MWBF '05 SURVIVOR= =CEBF '06 SURVIVOR= =August '06 COTM=
Posts: 9,130
Thanks: 0
Thanked 0 Times in 0 Posts
LakevilleSSEi is on a distinguished road
Default

Well SSEi, wanna have a TB scrubbing fest? I know for a fact that mine definantly needs a scrubbing, anyone else'* TB need a scrubbing too? I need to get this done before I hit the track this weekend.
LakevilleSSEi is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Things I have done to my 2001 Bonnie and things that need to be done Stinger357 2000-2005 11 02-02-2010 10:58 AM
From rough idle to high idle randman1 1992-1999 25 09-07-2004 09:20 PM
Supercharge Care and Feeding and Other Things compyelc4 Forced Induction 2 02-14-2004 03:56 PM
Painting my Exhaust Manifolds, and soon other things too! h1081dan General GM Chat 39 10-28-2003 09:40 PM
'00SSEi:rough idle,high idle...Please Help.... GTP2SSEi General GM Chat 2 07-29-2003 01:46 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 02:41 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.