Not very experienced with cars yet and could really use some guidance.
Car misfires at idle non-rhythmically and at about 950 when warm. When it gets warm, will misfire hard a few times at about 3000-3500rpm, jerking the car a little bit. When I push in clutch while driving the rpms will sit (or even rise if I'm under 2000) at about 2000 and slowly drop to 1500. I take my foot off the gas in gear it also takes ten seconds or so to drop down. If I wait and press in the clutch after ten seconds the rpms won't rise.
At idle: Vacuum sits kind of steady at 17in. (Shakes half an inch). Fuel pressure steady at 40psi. Don't have a compression tester, and the prospective results scare me anyhow
I replaced rotor, cap, plugs, and wires for tune up purposes hoping it would fix it, did not. Changed out all injectors (had two ohm out real bad). No change. Changed TPS hoping it would help. Nope. IAC valve looks in real good shape. Got a code 32 so I got a GM EGR valve and connector from a pick n pull car today with a beautifully clean engine bay. No change.
Previous owner had recently replaced water pump, head gasket, thermostat, and clutch. Any help would be awesome

 

Also changed intake manifold gaskets and the couple of gaskets around throttle body and cleaned the throttle body when I changed injectors

 

At idle in neutral does RPM fluctuate a few 100?
May be a vacuum leak.

 

Rpms stays steady at idle. Will bounce up and down about 50-100 rpm when the air is turned on (air conditioning or heat).

 

Sorry I have no other input.
I dont have TPI // TBI etc.

Someone will be of more exact help.
Best of luck