Coil Problem or ICM Problem?

 
Old 03-05-2014, 10:12 AM
  #1  
Audiworld Junior Member
Thread Starter
 
Join Date: Oct 2004
Posts: 63
Likes: 0
Received 0 Likes on 0 Posts
Default Coil Problem or ICM Problem?

Hello guys I'm trying to diagnose a problem with a misfire and want to know if I should replace a coil pack or the ICM.

Vag Com Codes

16684 Multiple Cylinder Misfire Dedectet
P0300 - 35-00 - -

16689 Cylinder 5 Misfire Detected
P0305 - 35-00 - -

16686 Cylinder 2 Misfire Detected
P0302 - 35-00 - -


Here is what I have done, I removed all DTC's and it had the exact same codes pop up immediately each time thereafter. The car runs terribly, no power at all.

Then I moved the #2 coil I believe (drivers side bank center cylinder) to the #3 cylinder I believe (drivers side bank rear cylinder) and the trouble code followed the coil. When I moved the coils back to original positions the codes again followed the coil. I've also replaced all the spark plugs of course started with taht.
tkinney80 is offline  
Old 03-05-2014, 10:56 AM
  #2  
Audiworld Junior Member
Thread Starter
 
Join Date: Oct 2004
Posts: 63
Likes: 0
Received 0 Likes on 0 Posts
Default

Forgot to mention, 01 Audi A6 2.7t Manual
tkinney80 is offline  
Old 03-05-2014, 10:56 AM
  #3  
AudiWorld Senior Member
 
Join Date: Jul 2013
Location: In the Cloud
Posts: 1,424
Likes: 0
Received 0 Likes on 0 Posts
Default

If the code follows the one ignition coil that you have moved, replace it. The driver side center cylinder is #5, not #2. You moved it to #6, not #3, so it's kind of weird that the fault moved with the coil from #2 to #3.

There is also a possibility that there is more than one ignition coil that is bad. There is no law that two cannot be bad at the same time.

Use a magic marker to identify which ones you know to be bad, or you will find yourself putting bad ones back in the car.
georgeb944 is offline  
Old 03-05-2014, 10:59 AM
  #4  
Audiworld Junior Member
Thread Starter
 
Join Date: Oct 2004
Posts: 63
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by georgeb944 View Post
If the code follows the one ignition coil that you have moved, replace it. The driver side center cylinder is #5, not #2. You moved it to #6, not #3, so it's kind of weird that the fault moved with the coil from #2 to #3.

There is also a possibility that there is more than one ignition coil that is bad. There is no law that two cannot be bad at the same time.

Use a magic marker to identify which ones you know to be bad, or you will find yourself putting bad ones back in the car.
It was a few days ago when I was doing the moving around so I may not be remembering it perfectly but it did seem that by moving one coil I could make the codes jump from the center two cylinders to the rear two though I may not recall the numbering correctly. Any input on where to get coils? I'm selling this car so I don't want to pay top dollar but of course I don't want to buy junk and cause more problems also so where do I find reasonably priced good coils?
tkinney80 is offline  
Old 03-06-2014, 02:45 AM
  #5  
AudiWorld Senior Member
 
Join Date: Jul 2013
Location: In the Cloud
Posts: 1,424
Likes: 0
Received 0 Likes on 0 Posts
Default

I find the factory coils to be pretty good, and keep a couple in the rear cubby of the trunk. I typically spend about $20 (check ebay) for used ones, test them immediately on receipt, mark them as good and have them handy. I have two coils and one icm in each of my 2.7Ts at this point. I also carry my laptop and my vcds cable with me on long trips... Nothing would irritate me more than having to spend a fortune for a diagnosis or new ignition part while in another state.
georgeb944 is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
cheesypoof
A4 (B5 Platform) Discussion
2
02-13-2013 08:24 AM
The Seed
A4 (B5 Platform) Discussion
4
10-15-2006 04:34 PM
q20v18t
A4 (B5 Platform) Discussion
17
04-27-2006 07:17 AM


Thread Tools
Search this Thread
Quick Reply: Coil Problem or ICM Problem?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: