I have a 2009 Subaru legacy with around 230k. It still has the oem coil pack installed, and I noticed something weird inside one of the holes.
If you look inside, there are some dark marks that I can't remove with cleaning.
-Do you think those marks affect the operation of that cylinder, or is there enough exposed metal to make up for it?
-The plastic area around that cylinder has started to turn white a little, too much heat?
The oem spark plug wires click into the oem coil to let you know they're secure, but this one particular cylinder has always been a bit troublesome, the wire doesn't click in the same way as the other ones do. I should also mention the metal part of the spark plug wire had a little bit of white corrosion on it when I pulled it out. Sort of hard to clean the metal since I couldn't pull back the boot much, but I was able to get it clean for the most part.
I don't have any misfires, and when I check the resistance between coils as instructed by the factory service manual, everything checks out fine. The plastic looks weird, but there are no actual cracks that I can catch my fingernail on.
I'm guessing the the connection between the wire and the coil pack was poor for that cylinder? I don't know much about this stuff, so I appreciate any thoughts.
*Edit: Sorry for the size of the pictures, I thought they'd show up as thumbnails.
If you look inside, there are some dark marks that I can't remove with cleaning.
-Do you think those marks affect the operation of that cylinder, or is there enough exposed metal to make up for it?
-The plastic area around that cylinder has started to turn white a little, too much heat?
The oem spark plug wires click into the oem coil to let you know they're secure, but this one particular cylinder has always been a bit troublesome, the wire doesn't click in the same way as the other ones do. I should also mention the metal part of the spark plug wire had a little bit of white corrosion on it when I pulled it out. Sort of hard to clean the metal since I couldn't pull back the boot much, but I was able to get it clean for the most part.
I don't have any misfires, and when I check the resistance between coils as instructed by the factory service manual, everything checks out fine. The plastic looks weird, but there are no actual cracks that I can catch my fingernail on.
I'm guessing the the connection between the wire and the coil pack was poor for that cylinder? I don't know much about this stuff, so I appreciate any thoughts.
*Edit: Sorry for the size of the pictures, I thought they'd show up as thumbnails.