[turo]

I'm doing a tune up on my '11 e92 n55 while chasing a misfire. I'm swapping all the plugs and coils, but I'm curious what you all though of the plug from cylinder 1 (where the misfire is). I can't read plugs worth a damn, does anything look abnormal?

I'm changing a leaky VCG at the same time, if it matters.

Pics here: https://m.imgur.com/a/oBaw8vT

[Sgop335]

Measure the spark plug gap, large gaps can cause misfire.
Is that your video? What borescope is that?

[turo]

Thanks, will do.

And yes that's my video. The borescope is a cheap one I found on Amazon. Works great for $25: https://www.amazon.com/dp/B07C9C6P5D...p_mob_ap_share

[Cloverdale]

It doesn't look oil fouled (cylinder miss not related to your cover leak). Don't use this type of gapping tool or risk pushing center electrode down into plug body.

[turo]

Thanks, all! I swapped the VCG and dropped some fresh plugs/coils while I was at it and that seems to have solved the problem.