Originally Posted by 95blackGsTurbo
Since your car is sputtering, I would suggest checking compression on that cylinder, ohm out the injector and check the coil packs resistance as well. Injectors should be between 2-3ohms. If you let me know what kind of coils you are have I can get you the specs on them as well. Definitely sounds like that cylinder is misfiring for whatever reason.
X2. i had a headgasket pushing an ever so slight amount of water into one cylinder and the plug was black as night. Dry as a bone, just enough to blow the spark out. Could also be a sticky injector, but start with a compression test. If that cyl is lower than the other ones, you know where the problems lying then.