How not to properly evacuate an air conditioning system. This moron doesn't understand that by pumping the system down to -30 PSI over the course of half an hour or more will cause more moisture to be removed from the system. You can get a cheap throw away vacuum pump for $59 dollars, not $200 dollars like he says.

Some say it will remove all the moisture in the desiccant out of the accumulator, but the accumulator acts as a filter also, as does the orifice tube, the so unless it pretty new, it all needs to be tossed,

Kiddo here wonders why his pressures are running high? That is because he is working on the cheap and didn't do the job properly., so he STILL has air in the system. The high side at 350 PSI is WAY too high. Of course, he mentioned selling it to some poor motorist, who will pay the price, sooner or later due to the ineptitude by "El Cheapo" here.