Ignitin coil moisture? - Club Touareg Forums
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post #1 of 15 Old 12-18-2013 Thread Starter
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Ignitin coil moisture?

Have an 04 v6. Te car is having some misfiring problems. The service liaison is telling me that the coils were poorly designed and don't allow moisture to escape. He said replacing the coils is necessary to prevent future misfire problems.

Has anyone heard if this type of problem?
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post #2 of 15 Old 12-18-2013
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There has been an ignition coil recall. Was your car included? My 2003 was.
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post #3 of 15 Old 12-20-2013
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Originally Posted by noobytoogy View Post
There has been an ignition coil recall. Was your car included? My 2003 was.
Did they replace your spark plugs at the time of the recall repair as part of the recall or no?
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post #4 of 15 Old 12-21-2013
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No.
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post #5 of 15 Old 12-22-2013 Thread Starter
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Problem was resolved with new coils and spark plugs.
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post #6 of 15 Old 12-22-2013
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Glad you got sorted.

Thanks for coming back and letting us know - lots of people don't!
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post #7 of 15 Old 10-15-2016
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Sorry for bumping an old thread here chaps. But this seems to be an ongoing problem for me.

Plugs have been replaced, as have the coils. Yet with just over 1000km since the coil plugs were checked, my misfire returned.

I pulled the coils today and found thus...
https://www.clubtouareg.com/forums/at...161242&thumb=1
this was the worst one, but all coils had some amount of water and corrosion in them.

what's the dealio here? could this be coolant? it had a brownish tinge to it, but i thought maybe it was just water and the corrosion caused the discolouration?

if not, how the heck is water getting in? i haven't sprayed the engine or driven through any water deeper than a couple of inches.

background is i have had the car for about 10k, and the misfire caused by this issue is now a third time deal.

in addition, i've had the rear brake light warning for a while now and one of the globes was dead. i've since replaced both and all working including the led strip thing on top of the tailgate - still got the dang message on the display. the "joys" of an 04 egg i guess. getting rather sick of troubleshooting rather than driving the thing.
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post #8 of 15 Old 10-15-2016
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How does the rubber seal look on the plug? The part that plugs into the coil from the wiring harness. There should be no water inside the plug cavity like that.

If all else fails, smear some die-electric grease in there to protect the contacts and possibly seal the faulty plug seal.

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post #9 of 15 Old 10-23-2016
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I suspect you're right - i believe the water is getting in through the plug that the wiring goes into (no idea what this part is called) and then making its way down to the coil connector, corroding along the way.

I wonder if I can replace those plugs or if I'd need to replace the whole wiring loom?

Just guessing now - but the drain plug above the firewall was quite gunked up with debris. I'm wonder if in heavy rain it pools in there and then sloshes around as the car bumps around?

Other than that I'll see what I can do to make the existing plugs watertight...
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post #10 of 15 Old 10-23-2016
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The plug on the wiring harness side should also be sealed. You could probably replace the connector on the harness side, but the tools to do it would be kinda $$ for a one time deal. :- /

Another option would be to find a used harness and splice in a known good connector. Probably not an ideal option, though.

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