When stopped in drive, car feels like its going to stall and AC is only working when it feels like it. Will start cold and then start blowing hot. Replaced battery, air filter, and spark plugs. Checked alternator and wasnt the issue. Plzzzz helppp

 

If you haven't found a solution yet, I'll offer this line of investigation up: to me this sounds like a failing bearing on one of your accessories. Worthwhile to check the condition of your accessory belt as well as the idler pulleys, water pump, Ac compressor. From my experience, at least one of these is making the engine work harder than it has to.