ok so itraded my car for a 91 240sx with turbo dont know much about what the guy did to it so my question is that he removed the oil catch can and i have a vacuum leak on one of the five ports under the throttle body which is the far right nipple i read that it goes to the catch can to the purge port and if i cap it off the car stalls so do i need the can or what do i do can anyone help with this thanks