I have some more information and a question. First, how do you get the spark plugs out and what size socket? I feel like an idiot for asking this, but I tried last night and I couldn't get a socket to fit on them. Second, I was messing around under the hood and I unplugged the MAF sensor and it started running better and the check engine light came on of course. When I plugged it back in the check engine light went off and it started running like crap again. Any suggestions would be greatly appreciated.

1990 LWB 3.0 Auto Tan interior Mostly Stock 194k