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Old 04-12-2004, 08:39 PM   #1
QAboy
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Unhappy rusty coil pack?

So my car is scting a little funny, kind of like running on just 3 cylinders (i.e. dislodged plug wire). I have magnecores, and I know some people have had trouble with them poppig off, however I pulled the coil pack ends off today and saw corrosion/rust on the male/coilpack end and there is presumably some in the plug wire boot as well. I think this would be a likely cause for the problem and need to know how to fix it and keep it from happening again. Can I just clean off the coil?

Thanks,
Eric
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Old 04-12-2004, 09:09 PM   #2
tre36
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I had this happened to me too. I clean it off somewhat with a wirebrush and sprayed some anti-rust battery terminal spray on it. So far looking good. However, car is still acting funny sometimes. I think the best option is to replace it and it is something I got to look into.
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Old 04-13-2004, 08:58 AM   #3
Texas25RS
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Don't use that spray.... it is not water proof... use dielectic grease.... that is what it is made for...

I put warning out over a year ago about tis.... Subaru does NOT apply the water prrofing grease to ANY of the plug connections.... that gets you this when you get water in the boots (easy to do without the scoop blocking plate):

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Old 04-13-2004, 01:56 PM   #4
CSM101
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Yep, happened to me.
New coil pack, new wires (Magnacore) and dielectric grease.
No more problems.
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Old 04-13-2004, 03:20 PM   #5
QAboy
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ok well if i wire brush it as best i can and reassemble with dialectric grease is that ok or does the coil pack need to be replaced. also what can i do about inside the rubber boot?

Eric
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Old 04-13-2004, 04:15 PM   #6
tre36
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So, the dialectric grease something I can just find at the local auto store? Thanks for the advice.
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Old 04-13-2004, 11:58 PM   #7
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New parts usually do the trick.
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Old 04-14-2004, 01:15 AM   #8
QAboy
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well I suppose if I have to replace parts I might as well upgrade. So, any recomendations aftermarket coil packs?
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Old 04-14-2004, 07:26 AM   #9
Texas25RS
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Quote:
Originally posted by ttboy19
New parts usually do the trick.
Waste of money most of the time. New wires are a good idea, but just clean off the coil pack and put the dielectic grease on them.

New parts will do the exact same thing without the grease.

Yes... most autoparts stores have the little packets of stuff for spark plug boots near the registers.... that is dielectic grease.
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Old 04-14-2004, 11:21 AM   #10
rob
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rust? Those are copper contacts. You have a burned out coil. I have had 2 coil packs go out the same way in the last 4 years. You need a new part.
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Old 04-14-2004, 11:28 AM   #11
Texas25RS
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Quote:
Originally posted by rob
rust? Those are copper contacts. You have a burned out coil. I have had 2 coil packs go out the same way in the last 4 years. You need a new part.
Not a burned out coil at all.

Go look at some pennies. Copper oxidizes just like most other metals. The black and GREEN is indicative of oxidized ("rusted") copper. Considering that photo was taken a year ago.... cleaned off the oxidation using a Dremel wire brush tool.... put on some waterproof grease.... and to this day, the connection (along with all of the other ones) are still free of corrosion.

It sounds like a mechanic out to make a buck would say that was a burned out coil when it was not burned out in any way.
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Old 04-14-2004, 11:38 AM   #12
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ive seen this in the past... i have a feeling that it starts with just alittle oxidation, but if left unattended it will burn out the coil pack, we have had t replace coil packs on cars because of the same thing pictured but the coil was infact dead
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Old 04-14-2004, 12:40 PM   #13
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try the coil test procedure from the FSM if you don't believe me.
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Old 04-19-2004, 12:28 PM   #14
Stickee
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I replaced my coil pack about half a year ago, problem (hesitation, rough idle) was fixed.

It recently came back, but I put the dielectric grease on yesterday, and everything seems to be fine.
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