2002 Pontiac sunfire, 2.2L The car is in great condition, in the process of doing a little work to it. I am in the process of doing a little engine repair as per the codes I got when I gave it a test. I want to be sure that I am on the right track, and Im just curious if anyone can offer assistance. First I was getting a misfire code, so this weekend I am changing the spark plug and then checking the cables a distributor. Second was an RPM code, which said it was reving high. And I can notice this when I drive it. As it revs high before I get any real power. This is the main issue. And my suggested fix was the idle air control valve, and then fuel filter. It appears to be getting fuel, so I dont believe its a pump issue. 3rd was an issue with a temperature circuit, likely a relay. But would that affect anything major? And the last code was for the 02 sensor, which I replaced already. If there is anything that I should do extra on top of what I am doing, can someone advise any other courses of action other than what I am already doing. Thank

One window does not move at all. The other is sluggish.