1995 SSE Rough Idle - FIXED!!! - 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 02-14-2007, 02:51 PM   #11
Senior Member
Posts like a Turbo
 
chevyboy572's Avatar
 
Join Date: Jan 2006
Location: Sacramento CA
Posts: 476
Thanks: 0
Thanked 0 Times in 0 Posts
chevyboy572 is on a distinguished road
Default

Yeah they should be the same. Most likely, the coils are gonna do the job.good luck on your car.
chevyboy572 is offline   Reply With Quote
Old 02-16-2007, 12:02 AM   #12
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Feb 2004
Location: Fargo, ND
Posts: 685
Thanks: 0
Thanked 0 Times in 0 Posts
lglarum is on a distinguished road
Default

Another question about the issue... Why would my car try to pulse ahead every time it'* about to die while it'* idling rough? This happens when I'm at a stop with the car in drive. I've been putting it in neutral and giving it gas to keep it goin when I have to.
lglarum is offline   Reply With Quote
Old 02-16-2007, 04:05 PM   #13
Senior Member
Posts like a Northstar
 
Join Date: Jan 2002
Location: southern California
Posts: 538
Thanks: 0
Thanked 0 Times in 0 Posts
billha is on a distinguished road
Default

What do you mean by 'pulse ahead'? Under some conditions, the ECM will command a higher RPM (maybe 1,000 RPMs or so) while idling, and it will then command the RPMs to drop down to the normal level (roughly 725 RPMs) within a few seconds after that.
billha is offline   Reply With Quote
Old 02-16-2007, 04:19 PM   #14
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

The 1995 PCM will not flash the SES like the OBD 2 cars when there is a Multiple misfire..

But the 95 PCM will display cylinder misfires in data group 2, any sudden slowdown in crankshaft speed will be seen as a misfire by the PCM

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 02-16-2007, 05:54 PM   #15
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Feb 2004
Location: Fargo, ND
Posts: 685
Thanks: 0
Thanked 0 Times in 0 Posts
lglarum is on a distinguished road
Default

Quote:
Originally Posted by billha
What do you mean by 'pulse ahead'? Under some conditions, the ECM will command a higher RPM (maybe 1,000 RPMs or so) while idling, and it will then command the RPMs to drop down to the normal level (roughly 725 RPMs) within a few seconds after that.
By "pulse" I mean that, while in gear, the misfiring seems to push the car ahead slightly rather than just idle peacefully with the brake pushed in. And this is why I have to put my car in neutral at lights so that I dont end up rear ending the person ahead of me.

Could it be something with the electronics where the misfiring causes something in the trans/torque conv to grab on during one of the misfires?
lglarum is offline   Reply With Quote
Old 02-19-2007, 09:00 PM   #16
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Feb 2004
Location: Fargo, ND
Posts: 685
Thanks: 0
Thanked 0 Times in 0 Posts
lglarum is on a distinguished road
Default

Got the coils from Boosty in and it'* still acting up. After some searching I found that bandit had a problem that sounds like what'* going on with my car. Here'* the thread... http://www.bonnevilleclub.com/forum/...f+test&start=0

I should be getting my Auto Xray this week sometime and will get to play around with that some and see if I can find anything. One thing is that the SES light doesn't come on all the time, just randomly. Maybe the EGR test can point me in the right direction.
lglarum is offline   Reply With Quote
Old 02-20-2007, 02:03 PM   #17
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Feb 2004
Location: Fargo, ND
Posts: 685
Thanks: 0
Thanked 0 Times in 0 Posts
lglarum is on a distinguished road
Default

I noticed today that I now dont have any kickdown... When I get on the pedal it starts to misfire. I think I'll check the plugs this afternoon just to make sure.

tested my old coils and am just adding this to have the info somewhere...

primary/secondary
Boosty'* coils
1-4 0.7/5.67
2-5 0.7/5.64
3-6 0.7/5.62

my old coils
1-4 0.7/5.63
2-5 0.7/5.51
3-6 0.7/5.81
lglarum is offline   Reply With Quote
Old 02-21-2007, 02:34 PM   #18
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Feb 2004
Location: Fargo, ND
Posts: 685
Thanks: 0
Thanked 0 Times in 0 Posts
lglarum is on a distinguished road
Default

I found while checking the front 3 plugs that there'* some exposed wire just off of one of the fuel injector plugs. Could being exposed mess with something or would it have to be able to short out to something metal for it to cause a problem? Ran out of time to check the back 3.

And for a lil more detail on what'* goin on. I was driving today at around 35-40mph, engine'* sitting at 3000rpm, I give it some gas and the rpms drop to 2500 and it starts missing. Also it decided to throw in a few backfires right after that. A friend of mine said it could be the fuel pump. We tested the fuel pressure not too terribly long ago, may have to do it again.
lglarum is offline   Reply With Quote
Old 02-21-2007, 07:46 PM   #19
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

Exposed wires can be an issue. Fix them up and report back.

Also Luke.. you'll want to test the primaries of the coils as well as the towers (or secondaries) that you already tested. Procedure in Techinfo.
BillBoost37 is offline   Reply With Quote
Old 02-22-2007, 12:39 AM   #20
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Feb 2004
Location: Fargo, ND
Posts: 685
Thanks: 0
Thanked 0 Times in 0 Posts
lglarum is on a distinguished road
Default

Quote:
Originally Posted by BillBoost37
Exposed wires can be an issue. Fix them up and report back.

Also Luke.. you'll want to test the primaries of the coils as well as the towers (or secondaries) that you already tested. Procedure in Techinfo.
I'll try to get on the wires tomorrow, I put some DE grease on the exposed area for the hell of it yesterday. I'll also get down into the rear plugs to check those. I did check both primary/secondary on the coils, primaries are first then a slash then secondaries. I updated the post with the numbers to make that more clear.
Thanks
lglarum 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
Rough Idle Fixed.... trixster68 1992-1999 1 07-20-2009 11:51 AM
P0300 & P1406 Codes and Rough Idle - Fixed Rob96Olds88LS 1992-1999 1 03-23-2007 08:17 AM
Rough Idle fixed adam marcum 1992-1999 14 03-11-2007 04:38 PM
FIXED!! : Rough Idle getting rougher...found Coolant LEAK singscountry1967 2000-2005 33 06-26-2006 08:18 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 06:44 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.