Hey all, new member to the forums. I have a 1990 Nissan Sentra 2d Sedan.. I have a few questions about it, but the main one happens to be about the AC.. I dont have the money to get a user manual (and I dont mean the generic one that comes with the car and cant answer any questions about anything really) and was wondering if anyone could help me out. The question is this: I want to recharge the AC but dont know what kind of AC recharge is needed (aka freon or what not) and I cant find the answer anywhere.