Spark Plugs, Interesting Observation - 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.

Closed Thread
 
 
 
Thread Tools Search this Thread
Old 11-26-2004, 05:34 PM   #1
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jul 2004
Location: Woodstock Ill.
Posts: 214
Thanks: 0
Thanked 0 Times in 0 Posts
Ranger is on a distinguished road
Default Spark Plugs, Interesting Observation

I had a misfire problem not long ago on my '97 Deville and the first step was to replace the plugs. At 92K all the platinum tips were gone. Well, my wifes '96 Bonneville 3800 series II (N/A) was running rough and at 112K I figured it was time. The manual calls for 41-601'*, but I found platinum tipped 41-921'* in there. When I bought the new plugs they (A/C Delco, dealer & parts stores) now call for 41-101 "Iridium" (I don't know what the difference between platinum and iridium is), which is what I bought. Interestingly enough, unlike the Northstar, when I pulled the plugs, all the platinum tips where there. In hind site all I needed to do was clean, regap and reinstall them and I'm sure they would ahve been good for another 100K. They were in such good shape I did, clean, regap and saved them, "just incase". Comments?

One other interesting note. I noticed that the A/C Delco box said "Made in Japan" :o
Ranger is offline  
Old 11-26-2004, 06:28 PM   #2
Senior Member
Posts like a Camaro
 
Join Date: Jul 2004
Location: Manassas, Virginia NOVA
Posts: 827
Thanks: 0
Thanked 0 Times in 0 Posts
CmptrNerd is on a distinguished road
Default

Even the throttle body says made in Japan (on my car anyway) but ahh whatever. The spark plug thing is something I wouldnt have done just because thats me and I like things to be perfect and brand new but I hope it works out for you as it seems like it has.
CmptrNerd is offline  
Old 11-26-2004, 06:43 PM   #3
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

NGK makes the AC Delco plugs. Either brand is favored for us.

Platinum is fine in the non-supercharged cars as well as Irridium or copper, but plain copper plugs or Irridiums are for the Supercharged cars. Platinums don't do well in forced-induction applications.

Read the Techinfo article on plugs
willwren is offline  
Old 11-26-2004, 08:04 PM   #4
Senior Member
Posts like a Supercharger
 
Join Date: Apr 2004
Location: Wisconsin
Posts: 185
Thanks: 0
Thanked 0 Times in 0 Posts
int_53185 is on a distinguished road
Default

I put bosch platinums in my 97 se...its starting to develop a miss at certain speeds...I've heard a mechanic say that because gm uses a higher voltage spark then other manufacturers...that the tip of the platinum plug will decay rapidly...i will have to pull one of mine to check....
int_53185 is offline  
Old 11-26-2004, 08:31 PM   #5
Senior Member
Posts like a Camaro
 
Join Date: Jul 2004
Location: Manassas, Virginia NOVA
Posts: 827
Thanks: 0
Thanked 0 Times in 0 Posts
CmptrNerd is on a distinguished road
Default

What do signs of a misfire consist of?
CmptrNerd is offline  
Old 11-26-2004, 09:18 PM   #6
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

Test a misfire at light throttle climbing a hill. You'll feel it.

Bosch plugs have been a nightmare in every GM vehicle I've owned. Bosch O2 sensors as well.
willwren is offline  
Old 11-26-2004, 10:48 PM   #7
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jul 2004
Location: Woodstock Ill.
Posts: 214
Thanks: 0
Thanked 0 Times in 0 Posts
Ranger is on a distinguished road
Default

Quote:
Originally Posted by CmptrNerd
What do signs of a misfire consist of?
Pull a plug wire and drive it on 5 cylinders and you'll know.
Ranger is offline  
Old 11-27-2004, 12:13 PM   #8
Senior Member
Certified GM nut
 
Join Date: Feb 2004
Location: CT
Posts: 2,099
Thanks: 0
Thanked 1 Time in 1 Post
SSEBONNE4EVA is on a distinguished road
Default Bosch

Have Bosch platinums in both my cars with no problems to date.
Sorry I have to chime in here.
SSE 34,000 on them
SE 5,000 on them.
I also have the stock ignition systems. I'll let you know if and when they fail.
SSEBONNE4EVA is offline  
Old 11-27-2004, 02:28 PM   #9
Senior Member
Certified GM nut
 
Join Date: Feb 2004
Location: CT
Posts: 2,099
Thanks: 0
Thanked 1 Time in 1 Post
SSEBONNE4EVA is on a distinguished road
Default spark

So if they were going to fail I would think it would show up in my SE first with
the Delco ignition and hotter spark.
Put NGK'* in the Supra, WOW what a difference from the Denso plug.
I plan to upgrade my SSE to the Delco next time I go wrecking.
SSEBONNE4EVA is offline  
Old 11-27-2004, 10:14 PM   #10
Senior Member
Posts like a Supercharger
 
Join Date: Apr 2004
Location: Wisconsin
Posts: 185
Thanks: 0
Thanked 0 Times in 0 Posts
int_53185 is on a distinguished road
Default

Mine started to miss at around 10,000 miles...it misses under lite acceleration at around 35 to 40 mph....otherwise it runs great.......still gotta pull a plug....the electrodes are very small on bosch platinums to begin with....platinum is very expensive! lol
int_53185 is offline  
 
 
Closed Thread

Related Topics
Thread Thread Starter Forum Replies Last Post
Tuning observation gojo83 Performance, Brainstorming & Tuning 2 10-04-2012 01:12 PM
no spark spark plugs mrfaysah Everything Electrical & Electronic 7 03-13-2010 11:59 AM
Unusual Observation bonneville2k6 Everything Electrical & Electronic 1 02-13-2007 06:32 PM
Nosedrive seal observation willwren Forced Induction 7 02-06-2006 08:16 PM
Spark Plug Wires and Spark Plugs buickpower3800sc Performance, Brainstorming & Tuning 4 03-15-2003 05:27 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 11:42 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.