Am I blind? I see mention of plugs changed but no wires. Simply pulling wires on these often breaks the carbon string inside to not idle right. Check for resistance, more than 5K ohms per foot of length and they are bad. Also, technically there are TWO PCV hoses, one in front and one that attaches to very bottom of intake, where it gives the most trouble. Most problems right where the hose enters intake, it sucks through side of hose where it has softened from continued exposure to fuel solvents. There is NO EGR hose that connects to PCV, that steel tube continues to the PCV valve up front and the second rubber hose I speak of. If IAC pulled did you known recover old gasket or rubber seal? Some use a flat paper gasket and some use a double circle rubber o-ring cast as one part. Either can have a tendency to stick to intake, if you put new part on with gasket, it will have two stacked and leak like sieve especially if the rubber one. Very hard to see up in there without a folding mirror. A local lean area at a vacuum hose leaking trips PCM into richening ALL cylinders since that is all it can do, meaning seeming rich is often a lean problem. 12.33 volts is not good either, that is around when batteries often start making car have seeming idle problems. A known good battery is 12.6 to 12.8 volts. Charge battery up FULLY and check alt output, dying alt can produce this stuff once battery is low enough.
Like he says, quit spraying carb fluid to find leaks, you're going to blow yourself up.