here's what i did.
1. found the low pressure valve cap and took it off and hooked up the hose for the recharger.
2. turned the car on and set the a/c on and turned the fans up all the way.
3. from there, i sat in the driver seat, keeping it at a steady 1500 rpms for three minutes and i had someone watch the gauge.
4. after that i charged it a little bit and yes i could hear the freon coming out.
it did make it a little cooler, like i said earlier, the a/c compressor turns on when i hit the switch, it pushes air through the vents and all the vent modes work. i only use the a/c when im on the highway because i have my windows up and when im on city or country streets, ill usually just have my window down. i never run the a/c with the windows down. last summer, you would get out of the car shivering because of the a/c, now it atleast cools it a little in the cabin.