The RIGHT way to do it is with a proper set of gauges, checking pressures as you go.
Assuming no other system problems, try this as
an alternative:
Buy an Interdynamics recharge kit - available at auto supply house, BJ's, K-mart and a couple of cans of R134a refrigerant.
You will be adding refrigerant via the LOW side service port located on the hose that runs in front of the radiator.
With the ebrake firmly set, start the car, let it idle in neutral.
Turn the MAX AC on, fan at full speed
Open the hood, locate the compressor clutch (lower, right side - Duratech appication)
Watch the compressor clutch. If your charge is low, the compressor will be 'short cycling'. That is, the clutch will engage for 5 sec or less, then disengage. This will occur repeatedly.
With MAX AC on, the compressor should run almost continuously.
To add refrigerant, install the fitting on the R134a can, connect the charging hose to the fitting.
Remove the cap from the low side service port and install the quick connect fitting to the port.
With the R134a can upright, screw the T-handle all the way in to pucture the can seal, then unscrew the T-handle all the way to allow the gas to enter the system.
Refrigerant will be pulled in each time the compressor engages. The 'run' time of the compressor will increase as the low side pressure increases as refrigerant is admitted.
Be patient, allow the contents of the can to be pulled into the system. The can will get cold, lowering the pressure. You can warm it with your hands or sit it in a coffee can filled with warm water.
Continue to observe the operation of the compressor, the 'run' time should get longer and longer. Check the temperature of the air from the center dash vent - should be cold.
You shouldn't have to add more than two cans.
When the can is empty, screw in the T-fitting, unscrew can, screw in new can, peirce seal as before and continue to charge.
When done, screw in the T-fitting and disconnect the quick connect from the low side service port.
Refrigerant in the eyes is not likely, but it would be a good idea to wear safety glasses in any case.
carry on.
AL
