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Q: Car was running fine and then started running rough on 1995 Toyota Corolla

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Has 200k on it auto trans,all oem parts,just had it smogged 2weeks ago,it was running great,and then all of a sudden,running rough in gear and neutral,I pulled the #1 plug wire,got good spark,little change in engine pulled #2#3#4 and engine changed dramatically,checked plug itself looked good
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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I'm gonna try and check the plug,then timing,then compression,hope its not that though,maybe get lucky with vacuum leak I'll let you know what I find thsnks
Ok, timings good,plugs and wires seem ok, compression is good on all cylinders all around 160.put everything back together,seemed to run fine,after a few trips up and down the road,it started doing it again, my alternator is squealing a little, do you think that this could cause a misfire? When it cools off I'll try and disconnect the negative cable on the battery to see if it dies
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