240sx weird problem. help

[mofeel]

Well i noticed my car acting a bit funny and found my number four cylinder wasnt firing. Plug was fouled. I decided to do a comp check as well and found my number 2 is 30lbs off. And seen the plug that came out of #4 was black all the way up to the porcelin. Did the comp check on it. It read fine at 130lbs but i noticed it was spraying fuel out of the cylinder. Any ideas?

[Sideways570]

Yeah I'd say you got a nice problem on your hands. I'm going to say first do a compression test on the whole engine, then find out how you fouled your plug..? Possibly check that your timing isn't off, and your compression may be off due to a bad compression ring. Do a wet compression test and see if any of the number change. Another thing that can foul plugs is your wires check the bottom of 4 and see if the rubber ring is there or cracked because that ring sits on top of the porcelain. Hope my rambling helped to alittle. Also hope you figure it out.