idle problem

So I started it today - the vacuum leak no longer exist , but it still had idling problems. On a cold start It runs perfectly fine. The vacuum is steady and the idle is at 1200 rpm and the car is building up oil pressure around 50psi- it's not until I push the gas pedal and rev it up it starts...

well i put an new alt on today thinking it would solve my problem but nnaa :surrender: so when i turn on my headlights my rpms jump down an when i out on my brakes or put down my windows, it will drop far as 200pms. tryed to look for an bad ground some where but couldnt come up with any...