Go Back   LS1TECH > WELCOME TO LS1TECH > New LS1 Owners - Newbie Tech
Sign in using an external account
Register Forgot Password?
Register iTraderTimeslips Photos Members Search Today's Posts Mark Forums Read Used CarsVendor Directory
Search

New LS1 Owners - Newbie Tech
Basic Technical Questions & Advice
Sponsored by
Improved Racing

Welcome to LS1Tech.com!
Welcome to LS1Tech.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join LS1Tech.com today!


Reply
 
Thread Tools Search this Thread
Old 07-30-2009, 05:05 PM   #1
Teching In
Garage is empty, add now
 
WS6.17's Avatar
 
Trader Rating: 0
Join Date: May 2008
Location: N CA
Posts: 9
Default How Do you test the coil packs ?

My check engine light came on, so I scanned it and said that it had more then one misfire?
WS6.17 is offline   Reply With Quote
Old 07-30-2009, 08:51 PM   #2
Teching In
Garage is empty, add now
 
Trader Rating: 1
Join Date: Feb 2009
Posts: 34
Default

ls1 coil packs are pretty much indestructable. i work at a gm dealership and have yet to see them fail. what codes do you have? p0300? any other codes? you likely have another issue spark/fuel related. no one can help without codes you pulled from it. give us a starting point.
lakefx7 is offline   Reply With Quote
Old 07-30-2009, 11:47 PM   #3
Teching In
Garage is empty, add now
 
WS6.17's Avatar
 
Trader Rating: 0
Join Date: May 2008
Location: N CA
Posts: 9
Default

I got it scanned and it said multipile mis fire p0300. It has stock injectors the check engine light stays on and some times will flash while driving, when i hit the accelertaor black smoke will come out?!
WS6.17 is offline   Reply With Quote
Old 07-31-2009, 12:47 AM   #4
Formerly darynC-10/23/10
2007 Chevrolet Silverado 1500
 
Daryn's Avatar
 
Trader Rating: 19
Join Date: Aug 2006
Location: gonzales louisiana
Posts: 2,301
Send a message via AIM to Daryn
Default

a little more info on the car please. IE mods, miles, latest maintenance..
__________________
2012 CCSB DENALI-upper middle-class sleeper
Daryn is offline   Reply With Quote
Old 07-31-2009, 06:55 AM   #5
Internet Mechanic
2002 Pontiac Trans Am
 
BlackScreaminMachine's Avatar
 
Trader Rating: 17
Join Date: May 2005
Location: Wallingford CT
Posts: 9,834
Default

Def a missfire.

Drive the car hard to clean off the plugs the shut her down in the area you will be looking in. DO NOT LET IT IDLE, then start pulling every plug to I.D. the rich one.
__________________
2002 NBM Trans Am SOLD!

http://ls1tech.com/forums/vehicle-cl...l#post17273103
BlackScreaminMachine is offline   Reply With Quote
Old 07-31-2009, 02:29 PM   #6
Formerly darynC-10/23/10
2007 Chevrolet Silverado 1500
 
Daryn's Avatar
 
Trader Rating: 19
Join Date: Aug 2006
Location: gonzales louisiana
Posts: 2,301
Send a message via AIM to Daryn
Default

make sure the porcelain and make sure its not cracked
__________________
2012 CCSB DENALI-upper middle-class sleeper
Daryn is offline   Reply With Quote
Old 07-31-2009, 02:37 PM   #7
TECH Senior Member
1999 Chevrolet Camaro
My Garage
 
SparkyJJO's Avatar
 
Trader Rating: 10
Join Date: Aug 2007
Location: Ohio
Posts: 6,230
Send a message via AIM to SparkyJJO
Default

Lick the coil pack to test it.

__________________
'99 Camaro, Mystic Teal Metallic, L36, A4, cammed, headers, tuned, Stranos and Bilsteins, Founders LCAs, relos, and adj. panhard. BLS w/ 5000k HID, tinted corners.
'02 Trailblazer, Forest Green Metallic and rusty two-tone, Vortec 4.2L I6, 4x4, 2.5" lift w/ 32s, custom projector headlights w/ 5000k HID, exterior LED conversion
SparkyJJO is online now   Reply With Quote
Old 08-23-2009, 05:46 PM   #8
Teching In
Garage is empty, add now
 
99 6 speed's Avatar
 
Trader Rating: 0
Join Date: Aug 2009
Location: Harker Heights, TX
Posts: 40
Default

I can tell you you don't want to try by holding the boot and grounding the plug. A shocking lesson learned at 15...
__________________
'99 Trans Am, LS1, T-56, T-Tops.
Upgrades: Ram-Air, KYB shocks, and a throttle pedal (*chuckle* didn't when bought).
Work needed: Where to start...
99 6 speed is offline   Reply With Quote
Old 08-23-2009, 07:16 PM   #9
TECH Resident
Garage is empty, add now
 
7camaro7's Avatar
 
Trader Rating: 15
Join Date: Oct 2006
Location: Tennessee
Posts: 907
Default

Quote:
Originally Posted by lakefx7 View Post
ls1 coil packs are pretty much indestructable. i work at a gm dealership and have yet to see them fail. what codes do you have? p0300? any other codes? you likely have another issue spark/fuel related. no one can help without codes you pulled from it. give us a starting point.
mine failed me at 56,000 due to an exhaust leak after my headers were installed. I had bolts to fall out where the a.i.r. connection goes on the pass side. My pass side plugs were fouled. I bought 8 new plugs and it got better but same ole po300. Bought 8 wires, got better, same ole po300. Bought 4 coils for the pass side. Got better and ultimately swapped the driver's side coils. I replaced all 8 plugs, wires, and then coils then it finally started running like a champ again I made sure to fix that exhaust leak too! and yea don't crack the porceline on the plugs. That'll cause misfires too
__________________
7camaro7 is offline   Reply With Quote
Old 08-24-2009, 09:32 AM   #10
On The Tree
Garage is empty, add now
 
8urford2002's Avatar
 
Trader Rating: 7
Join Date: Nov 2008
Location: Virginia
Posts: 142
Default

Same thing happend to my buddy. After we did a header install on his 2002 camaro he had a coil pack go out.
8urford2002 is offline   Reply With Quote
Old 08-24-2009, 07:50 PM   #11
Teching In
Garage is empty, add now
 
99 6 speed's Avatar
 
Trader Rating: 0
Join Date: Aug 2009
Location: Harker Heights, TX
Posts: 40
Default

would an in-line tester work on these? otherwise a clip on type would work.
__________________
'99 Trans Am, LS1, T-56, T-Tops.
Upgrades: Ram-Air, KYB shocks, and a throttle pedal (*chuckle* didn't when bought).
Work needed: Where to start...
99 6 speed is offline   Reply With Quote
Old 08-27-2009, 09:14 AM   #12
12 Second Club
Garage is empty, add now
 
Trader Rating: 0
Join Date: Nov 2005
Location: Rockwall, TX
Posts: 407
Default

Ignition Coil Test

1. Disconnect the ignition coil output wire at the distributor cap.
2. Connect a spark plug to the end of the ignition coil output wire which you just disconnected.
3. Connect a ground wire to the threaded portion of the spark plug.
4. Disconnect the ignition coil ground wire from the negative terminal on the coil (Green Wire).
5. Connect one end of a ground wire to the ignition coil negative terminal.
6. Turn the ignition switch to the ON position.
7. Tap the other end of the ignition coil ground wire jumper on an good grounding point (for example the battery negative terminal) and look for sparks at the spark plug that correspond to the frequency of your tapping of the ground wire.
8. If you have a good spark at the spark plug, the ignition coil is good.
9. If you don't get a good spark, check for approximately 12 VDC from the coil positive terminal (black wire) to ground with the ignition switch in the ON position. You should also get approximately 12 VDC from the coil negative terminal (Green wire) to ground

Ignition Coil Resistance Check
In addition to the test above, you may elect to perform an ignition coil resistance check as confirmation of the coil's condition.

1. Check the ignition coil primary coil resistance by connecting an ohmmeter between the positive (Black wire) and negative (Green wire) terminals on the coil. The resistance should be 0.4 to 0.6 ohms.
2. Check the ignition coil secondary coil resistance by connecting an ohmmeter between the coil output terminal and the ignition coil negative terminal. The resistance should be 5000 to 7200 ohms.
__________________
Disclaimer: You have just read my opinions. They may not be the same as yours. Do your own research, and donít believe the marketing BS, just because the salesman said it was so.

Thanks, David
91RS383 is offline   Reply With Quote
Old 08-27-2009, 01:35 PM   #13
Registered User
Garage is empty, add now
 
Trader Rating: 0
Join Date: Aug 2009
Posts: 4
Default

spray them with wd40 , it'll pull the moisture out and tell you if they are bad
batman911 is offline   Reply With Quote
Old 09-21-2009, 05:06 AM   #14
Teching In
Garage is empty, add now
 
Trader Rating: 0
Join Date: Jan 2009
Posts: 18
Default

Quote:
Originally Posted by lakefx7 View Post
ls1 coil packs are pretty much indestructable. i work at a gm dealership and have yet to see them fail. what codes do you have? p0300? any other codes? you likely have another issue spark/fuel related. no one can help without codes you pulled from it. give us a starting point.
mate coils do fail.
I have a failed one on my lap now

My LS1 commodore started running like a bitch on 7 cyls and threw a code

P0354
Circuit open, shorted or earther for less than 15 seconds

I started the car from cold the next day and the no4 header pipe had no heat at all after 1 minute of running so its more than a miss fire.

Relpaced it and all is good

I put it down to being too close to the stainless headers after my coil relocation so i have a shield now
mjr_350 is offline   Reply With Quote
Old 09-21-2009, 11:16 AM   #15
On The Tree
Garage is empty, add now
 
98z-28redcamaro's Avatar
 
Trader Rating: 3
Join Date: Sep 2009
Location: myrtlebeach sc
Posts: 197
Default

my check engine light flashed and turned out to have floated a valve
__________________

458RWHP/493RWTQ N/A
6**RWHP/6**RWTQ ON THE GAS
98z-28redcamaro is offline   Reply With Quote
Old 09-21-2009, 11:16 AM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Tags
1998, car, check, chevrolet, chevy, coil, coilpacks, gm, ls1, pack, packs, procedure, test, testing, truck, trucks


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 On
Refbacks are Off



All times are GMT -5. The time now is 11:02 PM.


Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.5.2
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details