When I first start the car in the morning the rpm will shoot up to 2500 then down to 1000 then back to 2500 all within 3 seconds then start slowly coming down to idle the it should.

Sometimes it will just shoot up to 2500 then just drop right to nothing and die. It will start right up the next try perfect and will not do it's funny idle bounce. It will just start normal and idle at like 2200 then slowly come down to normal.

I have checked for vacuum leaks and found nothing. My idle does not hunt when car is warm or anything. What could this be. This is not a huge issues it's just embarrassing when someone says nice car and then i start it to leave and it screams up then dies, lol.