Back again for help.....rough idle. - Page 5 - 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 08-07-2006, 05:00 PM   #41
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

PLug doesn't look bad from this vantage point. Check the plug wire like you planned.
lash is offline   Reply With Quote
Old 08-07-2006, 05:03 PM   #42
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
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

Jumping in w/o being able to read the thread (work ya know)

Anyone checked for vac leaks. Lately we've seen a few EGR tubes from EGR to lower intake with a crack, causing the leak.
BillBoost37 is offline   Reply With Quote
Old 08-07-2006, 05:08 PM   #43
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 BillBoost37
Jumping in w/o being able to read the thread (work ya know)

Anyone checked for vac leaks. Lately we've seen a few EGR tubes from EGR to lower intake with a crack, causing the leak.
Yeah, that'* where he started (page one), but thanks for the reminder!

Zeroburnz...BTW, since it'* been brought back up, did you ever verify that your EGR tube was solid with no cracks anywhere?
lash is offline   Reply With Quote
Old 08-08-2006, 12:07 PM   #44
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Feb 2006
Location: Normal, Illinois
Posts: 42
Thanks: 0
Thanked 0 Times in 0 Posts
zeroburnz is on a distinguished road
Default

May have overlooked that one, is it a vacuum connector similar to the others I had replaced? I do know where the EGR is but anyone have a pic showing the EGR tube? thanks.
zeroburnz is offline   Reply With Quote
Old 08-08-2006, 12:22 PM   #45
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

The EGR tube is tucked in tight on the driver'* side of the motor alongside the block.

Here'* someone else'* pic I stole from another thread. His pic shows where the EGR had a hole. A fairly common area for vacuum breach.



You can also search for "EGR Tube" and read some recent threads on this.

Note that this pic is from a '94 L27, not your '97 L36, but that'* what an EGR tube looks like. It is not just a cheap easy fix though, like the vacuum tubes were. Though the hardest part is getting the replacement tube.
lash is offline   Reply With Quote
Old 08-12-2006, 07:59 PM   #46
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Feb 2006
Location: Normal, Illinois
Posts: 42
Thanks: 0
Thanked 0 Times in 0 Posts
zeroburnz is on a distinguished road
Default

ok, gonna check for cracks in the EGR tube. What should the resistance of the plug wire be at ? The seal around the MAP sensor is broken, can i just replace that seal or do I need to buy a new sensor? Also noticed that the CEL has been going off more often than before. The car seems alot smoother for a while then the light comes back on and its back to crap again.
zeroburnz is offline   Reply With Quote
Old 08-14-2006, 11:36 AM   #47
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 zeroburnz
...What should the resistance of the plug wire be at ? The seal around the MAP sensor is broken, can i just replace that seal or do I need to buy a new sensor?...
From page two of thread:
Quote:
Additionally, I suggest you test the resistance of the ignition (spark plug) wire for that cylinder. The resistance should be 30K ohms.
As far as the MAP sensor seal, I'm not sure if you can replace that. Does it look like you can?
lash is offline   Reply With Quote
Old 08-14-2006, 11:40 AM   #48
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
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

Is the MAF seal actually broken or merely missing? The seal merely sits on the connector and could be found on many other connectors of the same size.
BillBoost37 is offline   Reply With Quote
Old 08-14-2006, 12:35 PM   #49
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Feb 2006
Location: Normal, Illinois
Posts: 42
Thanks: 0
Thanked 0 Times in 0 Posts
zeroburnz is on a distinguished road
Default

The MAP sensor seal is broken, on my car the seal is orange...doesn't look like the other connector seals since its round. Don't know about getting a whole new sensor but would putting a little silicone around there be a fix?Also don't know if you got the idea from my last post but the CEL comes and goes randomly. Still getting a P0303 (cylinder 3 misifre) as the only code. It doesn't sound like a mechanical problem to me and some others I've talked to, we're thinking more along the lines of electrical. Anyway I overlooked what the resistance was supposed to be on the plug wire a ways back, I'll check it out.
zeroburnz is offline   Reply With Quote
Old 08-14-2006, 01:24 PM   #50
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
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

check the plug and the wire... but expect that the coil is probably bad.

LMK if you need one to test with. You might only have an issue with it when the car is warmed up and the coil has also warmed up.

Is that the only CEL?

On the MAF seal. I happen to have a wiring harness at home and may be able to get the seal for you. The problem with using silicone is it would be more permanent than you want. Being on top of the engine..this shouldn't pose a problem as it doesn't get wet often. Is the seal torn or missing...maybe a picture would help out in this case.
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Brake pedal low again and again and again NMP1 GMC/Chevrolet Truck/SUV 2 07-17-2015 11:56 AM
Rough Idle, Foul rotten egg smell, Think 02? Think again. SSEBONNE4EVA General GM Chat 6 01-20-2008 05:18 PM
Falling back into OL-1/Misfiring/Rough Idle No CODES Daron97SSE 1992-1999 7 04-13-2005 07:59 PM
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


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 09:32 AM.


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.