1997 Honda Accord bad valve gasket set?

About a year ago I purchased a 97' honda accord, shortly after purchasing it I noticed oil on the plug wire ends. I went ahead and replaced the Valve gaket set, plugs and wires. It seemed to work okay. Now the problem has a occured again. I wasn't sure what could be wrong, I replaced the pvc valve with the kit. Should I look at vaccuum hoses for a clog? The car also has a slight sputter that the dealer said was just timing, and that it wouldn't cause it is this the case? Any help is appreciated.