what happens is when i start it cold. the car will start.
in the first few secconds after the car has been started as the revs are dropping to idle, they will drop to low and most times the car will just turn off. then when i re start it it starts fine.

there is no loss of power, no abnormal reving when the car is stationary.

im thinking its a vacuum leak or bad fuel.
this started the 1st cold start after i filled with bp ultimate.