If the cabin filter was doing it's job your evap is probably OK. I have about 100K mile on my '95 and have just replaced both compressor hoses due to leaks. Before you spend alot of money on testing I would recommend replaceing both of these hoses. If you have the time and talent and want to save 50% of the hose cost get the old ones repaired. If you don't have a local shop send the old ones to Century Auto AC in Phoenix, AZ. They do very good work. "century autoac.com" One post said to hold the refill cans upside down when refilling but read the can label. I've found that they all say to leave the can upright. Putting it in a bucket of hot tapwater for 30 min will speed things up a little.