AFM/Plugs?

[Gurney]

So my blacktop sr20 started to sound like it was dying, I originally thought the AFM. Took out 4 black spark plugs, chucked in some new ones and it ran like a new engine. A week later and its back to sounding like its dying, I havent been able to get the plugs out to look due to my tools being "taken". Figured the spark plugs have been fouled yet again, but not exactly sure why.

I was thinking that maybe the oil catch can which feeds back into the intake was causing the plugs to foul? A bit lost as to what to do, any help would be great :)

[RRob]

Running a bit too rich? Cooler leak or retune IMO

[Gurney]

had a tune a couple months back, checked all the pipes/clamps n shit and it all seems to be ok apart from having quite a bit of oil. It's gotta be that oil catch can feed line, cant find a damn breather to fit over it though >_<