Burnt Spark Plug Body???

[greenrover666]

Hey folks,

I have a CEL so I pulled the code and it's P0301 at cylinder 1.

I pulled the plug before I started getting to crazy and noticed it smelled of gas really bad and has a black ring on the porcelain between the plug boot and the nut.

Head job was done about 5 months ago. Truck seems to run normal with no stumble or rough idle.

Any ideas??

TIA

 

[Roving Beetle]

Pics would help but it sounds like maybe the porcelain is cracked and it's allowing the spark to arc out of the plug and onto the block/head. (that could leave a burned/charred looking area where the crack is in the plug)

Just a guess from the somewhat vague description.

Doug

 

[greenrover666]

Didn't mean to be so vague, Doug, thanks for your assessment though!

Here are a couple of pics and as I said it was the only one and this is where the misfire is occurring.

I replaced the plug and so far so good. I will see if it pops back up.

I just thought it odd and wondered if anyone had an explanation.