First of all, if it needs a charge of refrigerant it has a leak. Look for any black oily dirt at any of the connections, in back of the A/C compressor clutch assembly, and/or spots on the condenser core(in front of the radiator).
The hose connections are the most common leaks, then the compressor crankshaft seal, and then the condenser (pin-hole leaks from corrosion or stone strikes).
If you find a leak at a hose connection it is usually due to an O-ring that nees to be replaced. If your system is near empty, you may as well fix the leaks, vacuum the system, and recharge it.
Your 94 should be an R-134a refrigerant filled system. R-134a is relatively inexpensive so you can try adding a 8oz or 11 oz can of R-134a. I would get a can that has a couple of ounces of refrigerant oil(to make up for what was lost due to the leak). Get an A/C thermometer and put it in the center vent of the dash. Depending on the ambient temperature, you should be able to get the air comming out of the vent down to about 40 degrees F.
The refrigerant is added to the low pressure line and the valve should be back by the firewall on the passenger side of the car. CONFIRM this, because I am not 100% positive about the 94 model year. Unless you have a set of gauges so you can determine what the pressures are in the system, you should add 1 can and see what happens. If your A/C compressor is activateed but "cycles", then add another can. Do not add any more than that without the gauges.
You DO NOT UNDER ANY CIRCUMSTANCES want to add refrigerant to the high pressure line, period. Wear eye protection. rangerj
right now it just blows cool air. Any help will be greatly appreciated. thanks
