Fuel smoke and fouled plug

512Stroker said

I here what your saying - the one plug deal.
I will tell you that engines that are not vented properly can and will do strange things. As $cheap and simple as it is to add it to your engine it would be one less issue to eliminate. Cant hurt and you my like the outcome.

Click to expand...

Absolutely agree. I’m on the hunt for a cap/pcv combo that has the same hose size as my carb. I got a little distracted with the other issues.

On a positive note, reseating the valve seal and driving the car cleaned my plug up.

Looking more like a cylinder or ring issue.