When I turn on the A/C, the compressor kicks on, but it seems to make quite a bit of noise, and it barely cools. Further than that, I can't seem to get it to blow out the front vents. So, I have 2 questions, 1, I'm pretty sure this car has R12, so should I try to find someone who has a couple of cans of R12 and try and recharge it to get it running better, or should i convert it to R134 and what does that involve. Also, the other question is, does the A/C blend door (the thing that changes the vent the air comes out) run off a vacuum system, or is it controlled by an electric motor and I'll probably have to replace it? Thank you.