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Old 03-24-2004, 04:45 PM   #1
LetItSnow
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Join Date: Jun 2003
Chapter/Region: Tri-State
Location: Cicero, NY
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'10 &'12 Foresters
another Miata convert

Default Oil on the spark plug boot?

I've been getting hit with the 0301 lately... misfire cylinder 1. It happens about 4800RPM in 4th, three of the four times.

I checked the connection at the coil pack - it's nice and clean. Just for sport, I pulled the plug boot to make sure it was "popped" on, and it was, but when the boot came out, it appeared to have oil on it! It wasn't soaked, just a little wet in a couple of places, but I'm reasonably sure that's not supposed to happen.

Anyone want to venture a guess? I can't look at the car til tomorrow cos of work and school.
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Old 03-25-2004, 12:19 AM   #2
spshultz
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'12 SantaFe

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Oil on the sparkplug boot? Easy answer since I just went through this.

When you replace the valve cover gaskets you will receive two valve cover gaskets, 4 sparkplug tube flared gaskets and 10 bolt gaskets. The flared sparkplug tube gaskets fit on top of the metal tube the sparkplugs sit in. These flared gaskets sit between the tube and the valve cover itself. Over time they get hard and shrink just a tad allowing the oil to seep past into the tube.

So basically it's time to replace them. Since you have to take the valve cover off you might as well replace the valve cover gaskets also.

I'm sorry if my description of those tube gaskets is awful but they are hard to describe. They are round, the bottom is about 1" in diameter and the top flares out to about 1.5" in diameter. You just pull the old ones off (will be very easy) and push the new ones on (will be a bit harder to do).

If you don't replace them, the oil seepage gets much worse as in my case.

As to why the misfire is happening I couldn't tell ya. I had a lot of oil seepage and mine never misfired. You might want to check the plug wire with a multimeter and check the plug for cracks and a good connection.
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Old 03-25-2004, 02:11 AM   #3
LetItSnow
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I wonder if it's the same side that I had the head gasket replaced on? I'll have to check into that. Do you think this would be a warranty job?
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Old 03-27-2004, 01:55 PM   #4
freeriding420
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I have 74k on my 02 RS. It's had seepage for a while. About a month ago I took it into SS and had a compression and leak down test done (to try and determine an oil consumption issue). Any how Everything was well with in spec. The oil seepage isn't an issue, but if you got a free weekend or have talented budy do the gaskets (when you get a chance).
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Old 03-27-2004, 02:58 PM   #5
LetItSnow
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I'm still inside the factory warranty, so I wouldn't want to do the work if it was Subaru's obligation.

How bad an idea would it be to swap the coil in my car for the one in my girlfriend's OBS and see if the problem with the misfire follows it?
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Old 03-27-2004, 03:25 PM   #6
freeriding420
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If anything to try swapping I'd think the wires would be your best bet. Have you pulled your plugs to if there is any foulling? Or other signs? And do you have a header or exhaust? Either of those can contribute to your missfire code.
If you are still under factory waranty then I'd take it into the dealer and have a note made of your oil seepage. Even though it's nothing now that'll save you in the long run.
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