Testing Coil Pack? - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



Welcome Enthusiast! If you already own a Chevy TrailBlazer or GMC Envoy or perhaps thinking of purchasing such a vehicle, then you have come to the best TrailBlazer and Envoy site on the net! Rainier, Bravada, Ascender, and 9-7x owners welcome too!

You are currently viewing our site as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to search and post topics, communicate privately with other members, respond to polls, upload content, and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.
Join Today!
Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

TrailVoy.com is the premier GMC Envoy Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools
  #1  
Old 04-11-2008, 08:32 AM
rg567 rg567 is offline
Junior Member
 
2002 GMC Envoy SLT
Light Pewter Metallic 4.2L I6 4X4
Join Date: Mar 2007
Location: Wisconsin
Posts: 17
Testing Coil Pack?

My 02 Envoy has a little miss at idle and I'm begining to suspect one of the coil packs is to blame. Is there any way to test these coils with a fluke meter or anything else?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 04-11-2008, 08:55 AM
petevw's Avatar
petevw petevw is offline
TrailVoy Alumni
 
2002 Chevy TrailBlazer LTZ
Red Jewel Tintcoat 4.2L I6 4X4
Join Date: May 2007
Location: Orange County, New York
Posts: 3,245
I have been wondering the same thing. I had a miss too, but it never set a code, so I didn't know which coil it was. I ended up changing all six and that solved the problem (got them cheap on eBay).
__________________
Always remember: wherever you go, there you are!
PCM4less,HID,DRL killer,cabin air filter,Mobil 1,K&N,LED's,193K+,
Reply With Quote Quick reply to this message
  #3  
Old 04-20-2008, 02:53 AM
jurassic3k jurassic3k is offline
Junior Member
 
2002 Chevy TrailBlazer LTZ
Fire Red 4.2L I6 4X4
Join Date: Feb 2006
Location: las vegas, nv
Posts: 5
I just changed my plugs and one of the coils was rusted. No missing that I can detect but it might need to e replaced. Any ideas on the cost?
Reply With Quote Quick reply to this message
  #4  
Old 04-20-2008, 04:31 AM
Coach Steve's Avatar
Coach Steve Coach Steve is offline
Senior Member
 
2003 Isuzu Ascender
Blue/Silver Two-Tone 4.2L I6 2WD
Join Date: Feb 2006
Location: Chandler, AZ
Posts: 730
They're right around $55.00 each at RockAuto.com
__________________
"SHUT UP AND LISTEN - You can't learn anything while you're talking!"
Reply With Quote Quick reply to this message
  #5  
Old 02-01-2012, 06:11 PM
scoulter4's Avatar
scoulter4 scoulter4 is offline
Junior Member
 
2002 Chevy TrailBlazer LTZ
Black Granite Metallic 4.2L I6 4X4
Join Date: Feb 2009
Location: Noblesville, IN
Posts: 9
Is there a brand that everyone recommends? Obviously beside OEM for the coil packs?
Reply With Quote Quick reply to this message
  #6  
Old 02-01-2012, 10:08 PM
TrailblazrI6 TrailblazrI6 is offline
Moderator
 
2002 Chevy TrailBlazer LT
Summit White 4.2L I6 4X4
Join Date: Dec 2011
Location: E. Greenwich, RI
Posts: 438
Quote:
Originally Posted by scoulter4 View Post
Is there a brand that everyone recommends? Obviously beside OEM for the coil packs?
With something like the coilpack, an OEM Delco is always preferred. However, Ive been using a Duralast from Autozone for 4 or 5 years now with absolutely no issue.

The real issue is getting to the coil pack failure; was it a result of a bad hood seal causing water to leak onto/into the spark plug wells and shorting out the coil pack, a bad valve gasket causing oil to leak in the wells and short out the coil pack, or just age?
__________________
If you have requests, need to report SPAM or need to tell me something in confidence, please PM me.
Happy Trailvoy'ing!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum forums, you must first register.

Please enter your desired user name, your email address and other required details in the form below.
(Only letters, numbers, dashes and underscores are permitted for user names)
The user name that you choose is permanent and can never be changed.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
How to: Replace blower resistor pack replacement WITH PICS! K2JJB The 02-09 "How-To" and DIY Section 698 12-02-2014 09:46 PM
coil spacer help gotspeed1 Suspension 2 04-23-2008 10:40 PM
Coil Lifts...? jhj521 Suspension 6 01-19-2007 10:43 PM
Battery isolator coil connection jzdt8x General 1 10-02-2006 06:36 PM
2wd/4wd coil question goes211 Suspension 4 01-26-2006 08:25 PM


» Sponsors

Advertising Info

All times are GMT -4. The time now is 05:14 AM.


Chevy TrailBlazer and GMC Envoy Enthusiasts - Copyright 2004 - 2009 All Rights Reserved.
All trademarks referenced herein are property of their respective owners.
RSS Feed