My idle issue is, everytime i start the car cold it dies unless i give it gas. This lasts for 3 min or so then its fine. Ive searched the idle sticky thread and still no go. Heres the thing, since i bought the car 3 years ago its had this problem. Now today i went out looking for vac lines and stuff because that has to be the problem because ive double checked everything else. Now on that vac port thing thats on the passenger side firewall, "the thing with 3 ports, 2 pointing down and 1 pointing to the drivers side fender" it has a vac cap on it on the one pointing to the drivers side fender. I ran a vac hose from that to the vac port thing labeled "A/C" and now when i turn the car off i hear a loud hissing coming from the ac vents right about the radio, what would cause this and how should i fix it? I really hope this makes sense!!