Random/multiple misfire, cylinder # 3 - 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 02-22-2006, 06:23 PM   #1
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 Random/multiple misfire, cylinder # 3

Hi, my 97 Bonne SE (non */C) w/ 115k keeps throwing a random/multiple misfire and a misfire on cylinder # 3 code (two different codes). Only feels rough at idle and the exaust pops...like 3 or 4 times repeatedly then pauses and keeps doing the same thing over and over. I can really feel the vibrations in the steering when im idleing. Changed plugs and wires when problem first started, problem is still there although the car did need the plugs. Also checked intake manifold for vaccuum leak and couldnt find any. IAC valve just replaced and MAF sensor as well. Does this sound exaust related as the noise is coming from back there ?
zeroburnz is offline   Reply With Quote
Old 02-22-2006, 06:29 PM   #2
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default

how old are your plugs, wires and coils???
1993 SLE is offline   Reply With Quote
Old 02-22-2006, 06:33 PM   #3
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

Plugs and wires are about 3 months old.....plugs i used are Autolite platinum. The coils have never been replaced to my knowledge.
zeroburnz is offline   Reply With Quote
Old 02-22-2006, 06:47 PM   #4
Senior Member
True Car Nut
 
Join Date: Feb 2006
Location: Melrose
Posts: 4,596
Thanks: 0
Thanked 0 Times in 0 Posts
BLACK94SSEi is on a distinguished road
Default

Your coils probably need to be replaced.
BLACK94SSEi is offline   Reply With Quote
Old 02-22-2006, 07:04 PM   #5
Junior Member
 
Join Date: Feb 2006
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
CrimsonJ is on a distinguished road
Default

Yep, had that same code on my '97 SSEi.
Change the coils.......all of them.
CrimsonJ is offline   Reply With Quote
Old 02-22-2006, 07:08 PM   #6
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

With just a misfire code..there is no reason to just replace parts to spend money. Swapping the coils, checking battery cables for corrosion and connection, and connection of ICM is the first steps I'd recommend.

Simply replacing all coils is typically a waste of money. One coil may fail..but two at the same time? Doubtful.

If the ICM fails..ok..it might act like more than one coil. If you need coils or ICM'* please check the for sale section or pm me.
BillBoost37 is offline   Reply With Quote
Old 02-22-2006, 09:11 PM   #7
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

okay...forgot to add that a mechanic that checked it out earlier did swap my coil for cylinder 3 with a good one and there was no change. Could the other coils cause a problem then ? Also is there a lifespan for coils as there is for spark plugs ? I will try to swap them and see if that changes before i spend more $.
zeroburnz is offline   Reply With Quote
Old 02-22-2006, 09:14 PM   #8
Senior Member
True Car Nut
 
Join Date: Jul 2004
Location: Twin Falls, Idaho
Posts: 7,545
Thanks: 0
Thanked 1 Time in 1 Post
Hans is on a distinguished road
Default

Quote:
Originally Posted by zeroburnz
okay...forgot to add that a mechanic that checked it out earlier did swap my coil for cylinder 3 with a good one and there was no change. Could the other coils cause a problem then ? Also is there a lifespan for coils as there is for spark plugs ? I will try to swap them and see if that changes before i spend more $.

do you have a multimeter you can check the resistance? this sometimes can help rule stuff out.....if one coil is really bad it will show up on a multimeter.

It could be ICM related or crank sensor or anything related to the ignition process.
Hans is offline   Reply With Quote
Old 02-23-2006, 12:57 PM   #9
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

Update: check engine light went out yesterday and hasnt come back on since.....but misfire is still occuring.......any thoughts ? And yes i can get ahold of my dads multimeter to check coil resistence. Could a misfire be caused by the EGR valve ? i read somewhere that it could have trouble opening or simply be stuck. Also ill see if swapping the coils around with help me narrow the problem even further.
zeroburnz is offline   Reply With Quote
Old 02-23-2006, 01:26 PM   #10
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default

get that code scanned, even tho the light is off the code can still be stored in the PCM.....that will tell us somemore info on what is going on
1993 SLE is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
03 bonneville ssei multiple random misfire Revaughn5 Pontiac Bonneville 16 04-07-2015 06:23 PM
3.1L P0300 DTC 'Random/Multiple cylinder misfire' Ben Cartwright General GM Chat 2 08-09-2013 10:27 PM
p0300 Random/mult cylinder misfire (fixed) bonnie_99 1992-1999 16 05-08-2011 10:55 PM
random multiple misfire codes doodle4prez 2000-2005 6 01-18-2010 03:49 PM
97 SE random multiple misfire problem GMMuscle91 1992-1999 19 01-19-2009 11:27 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 10:53 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.