So, after paying a shop $250 to vacuum and charge my A/C system, and being really disappointed with the vent temps, I followed the old addage, "if you want something done right, you have to do it yourself". They way overcharged the system, and pressures were through the roof. This was supposed to be a reputable A/C shop, they handle all the EMS vehicles around here, etc. Very disappointed. I think they just threw in 80% of the factory charge, got mildly cool air and said "good enough for an old truck."
Turns out the system was overcharged by a decent amount. I tackled it with the gauges, watching pressures, and "recovering" the charge, just a bit at a time. Test drive, check temps, check lines for sweat, repeat. I was able to drop the pressures, increase cooling (47* full blast, 42* with fan turned down), and still verify that the accumulator and return line were sweating (not undercharged, still returning cool vapor to the compressor to cool it down, and supply it with oil).
I'm pretty irritated about spending $250 for them to just slap dash that in there. They spent zero time fine tuning it.
