Basically this is my last chance before it goes to the mechanics.... which isnt a problem, I just like tinkering and getting stuff workin myself.

Took the spark plugs out and one is fouled. Covered in black soot.



I wire brushed it all off, put it back in and the car runs fine. But after a min it fouls again and misses. The plugs themselves are on good condition. I swaped them about and it only happens in the one cylinder (its the second from the right). There is def spark as it runs fine after cleaning it. Im lost

If its not tuned wouldnt all plugs foul? Could it have something to do with a blown headgasket as im still not convinced that its ok.
Pings a little.. timeing problem?

Anyhelp appreciated