OK DJ - I think your system is overcharged. You state that your system was completely evacuated, which is good because that gives me an idea of where you started. You also state that your mechanic noted that the "pressures" should be "88" after what he read on the fuse box. I believe that your mechanic might have misread that information. Take another look at the label he read - it probably reads ".88 kilograms" which is the total amount of refrigerant that is to be used in the system, which equals about 1.97 pounds or 31.5 ounces. Here in the states, R-134a (which is the required refrigerant and hopefully what your mechanic used) comes in various size cans, but are normally between 14 and 16 ounces, so two cans would probably be sufficient in charging the Crossfire system if has been completely emptied.

As far as your pressures go - no matter what measuring unit is being used, "88" is not even in the spectrum. If you are using kPa (Kilopascals) then your charge port (low side) pressures could have been anywhere from 241 to 303, depending on your outside temps and humidity on the day you charged your system. If you are using PSI (pounds per square inch), then your pressures could have been between 35 to 44, depending on your temp and humidity.

I am attaching the Service Manual A/C service info that has a helpful chart that shows the pressures you should be seeing if charged properly so you can take it to your mechanic. Maybe he can readjust the pressures for you to match this Service Manual information.

I recently overcharged my A/C as well. It was blowing cold, but the pressures still read low so I added another 14 ounces of R-134a. After I did that, I had no cold air at all, it was about the temp of the outside air. Since I didn't have the proper set of gauges with me, I just took the cap off the low side charge port and, in a well ventilated area and with the engine running and the A/C on and on full cold, started bleeding refrigerant from the system by pressing the piston of the charge port with a screw driver (kind of like letting air out of a tire). Release some pressure for about 3 to 5 seconds then let the system balance out for about 3 minutes and then check the air at the vents to see if it's getting colder. You might even pick up a thermometer that you can attach to the vent to record the actual air temp - that will give you a better idea of what is happening. I got my air temp at the vent down to about 54F (about 12C) on a 100F (38C) day.

Hope this helps!

RL