Coil Pack Help - 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 01-29-2008, 07:49 PM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: May 2007
Location: Dallas (Lewisville), TX
Posts: 98
Thanks: 0
Thanked 0 Times in 0 Posts
Kimbo is on a distinguished road
Default Coil Pack Help

I have a Check Engine light on and diagnosed a P0300 code. I finally got around to testing my coils and need some help telling if the packs are bad.

Pack 1 (1/4)
Secondary 5.56 K ohm
Primary 1.0-1.2 ohm

Pack 2 (2/5)
Secondary 5.73 K ohm
Primary 1.3-1.5 ohm

Pack 3 (3/6)
Secondary 5.48 ohm
Primary 0.8 ohm

Are packs one and two bad? Would these readings explain the code and stuttering during acceleration in the 2k-3k RPM range.

Thanks
Kimbo is offline   Reply With Quote
Old 01-29-2008, 09:31 PM   #2
Senior Member
Posts like a Northstar
 
Join Date: Dec 2005
Location: Indianapolis
Posts: 560
Thanks: 0
Thanked 0 Times in 0 Posts
impatient99 is on a distinguished road
Default

MAybe not the best way but with each of the posts, maybe just pull the wire off the plug, place it close to metal [NOT near any of the gas lines or sensors] and see if it is sparking. You will see and hear it. Don't run like that long tho.

I once had the 1/4 go bad and the 1 would not spark at all. Mine was easy tho cause it was rusted so the problem was evident before I ever started.
impatient99 is offline   Reply With Quote
Old 01-29-2008, 09:40 PM   #3
Senior Member
Posts like a Corvette
 
Join Date: Feb 2007
Location: Sanford Michigan
Posts: 1,200
Thanks: 0
Thanked 0 Times in 0 Posts
crash93ssei is on a distinguished road
Default

Well, looking at this Tecninfo article Ignition coil troubleshooting , it looks like they might be bad. The primaries are out of spec a bit.
crash93ssei is offline   Reply With Quote
Old 01-29-2008, 11:23 PM   #4
Member
Posts like a V-Tak
Thread Starter
 
Join Date: May 2007
Location: Dallas (Lewisville), TX
Posts: 98
Thanks: 0
Thanked 0 Times in 0 Posts
Kimbo is on a distinguished road
Default

Will Autozone test them?
Kimbo is offline   Reply With Quote
Old 01-29-2008, 11:27 PM   #5
Junior Member
 
Join Date: Apr 2006
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
Bonneville92V688 is on a distinguished road
Default

Quote:
Originally Posted by Kimbo
Will Autozone test them?
I wouldn't trust AutoZone with a piece of paper. Double and triple check them before determining they are bad. If you want someone else to test them, find a good auto shop and have them do it.
Bonneville92V688 is offline   Reply With Quote
Old 01-29-2008, 11:31 PM   #6
Senior Member
True Car Nut
 
Join Date: Mar 2004
Location: Ames, Iowa
Posts: 3,066
Thanks: 0
Thanked 1 Time in 1 Post
bill buttermore is on a distinguished road
Default

Quote:
Originally Posted by Kimbo
Will Autozone test them?
The primary on the first coil is marginal, the primary on the second coil is out of spec (.05 - .09 ohm)

You could try some junkyard coils that test within spec without spending a lot of dough.

Could also be bad plugs or wires.
bill buttermore is offline   Reply With Quote
Old 01-30-2008, 12:12 AM   #7
Member
Posts like a V-Tak
Thread Starter
 
Join Date: May 2007
Location: Dallas (Lewisville), TX
Posts: 98
Thanks: 0
Thanked 0 Times in 0 Posts
Kimbo is on a distinguished road
Default

Quote:
Originally Posted by bill buttermore
Quote:
Originally Posted by Kimbo
Will Autozone test them?
The primary on the first coil is marginal, the primary on the second coil is out of spec (.05 - .09 ohm)

You could try some junkyard coils that test within spec without spending a lot of dough.

Could also be bad plugs or wires.
Thanks for the advice. I replaced the plugs and wires in the summer, so I don't think that'* it. I'll pull a coil from the Buick and see how it tests.

As for parts, is Autozone out too? They list a coil pack for around 25 bucks.
Kimbo is offline   Reply With Quote
Old 01-30-2008, 04:02 AM   #8
Junior Member
 
Join Date: Mar 2006
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
myfirstbonnie is on a distinguished road
Default

I got an entire ign set up with module and 3 coils i matched myself for $20 from the u-pull-it. I even got an extra set on my shelf. PM me if you need a coil.
myfirstbonnie is offline   Reply With Quote
Old 01-30-2008, 08:56 AM   #9
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

They are not out of 'spec'. The Techinfo article is just an average of half a dozen coils of each type.

You will never notice a difference in performance with those numbers. Not perfectly matched, and not super-ideal, but not bad either.

For P0300, clean the posts on the coils, check the resistance of the wires while a friend gently bends and lightly twists them, inspect all 6 plugs to see if it'* isolated to one or two.

If a coil were bad, it would take out two cylinders. If a post is corroded, it could be a random on one. Make sure your #5 and 6 wires aren't touching the O2 harness, and make sure no wires are arcing to ground. The best way to check that is to lightly mist the engine with water (windex bottle) at night while you idle with the lights off.

I seriously doubt the coils themselves are your problem. They are an on/off device.
willwren is offline   Reply With Quote
Old 01-30-2008, 09:28 AM   #10
Senior Member
True Car Nut
 
Join Date: Mar 2004
Location: Ames, Iowa
Posts: 3,066
Thanks: 0
Thanked 1 Time in 1 Post
bill buttermore is on a distinguished road
Default

Quote:
Originally Posted by willwren
They are not out of 'spec'. The Techinfo article is just an average of half a dozen coils of each type.

You will never notice a difference in performance with those numbers. Not perfectly matched, and not super-ideal, but not bad either.
Thanks for the correction, willwren. I learn something new every day.
bill buttermore is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
New coil pack, still no spark Help! (fixed) roadkingmi 1992-1999 6 12-03-2011 06:20 PM
Need help with coil pack issue MuzikMan General GM Chat 6 02-27-2010 09:27 PM
Coil pack help -- '92 GP crash93ssei Your Other Rides: Pics & Videos 9 02-16-2008 03:56 PM
Need to identify TACH lead coming out of coil pack acg_ssei Audio (and aftermarket electronics) 9 03-24-2003 03:33 PM
'92 SE Module/Coil Pack Failure SweetBonBon 1992-1999 9 10-21-2002 01:33 AM


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 11:00 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.