Looks like a brown control valve.

Swap it out for a Green one if you want lower evaporator temps.

The compressor is de-stroking to hold the 42 psi low side. So the high side pressures drop too.

That is basically a P/T chart for both R12 (white scale) and R134a (Red / blue scales)

It is used as a quick reference.

The A6 compressor has a sump. Oil should be added there when installing a fresh unit. The sump level can be checked with the system discharged & compressor still mounted on the vehicle. Here is the procedure under "Frigidaire 6 cylinder" http://vintage.mitchell1.com/PClubData/chassis/e...

Ok, you have all new components. Obviously the one non OEM part is where the problem is. The OEM TXV has a pressure reference line that was originally plumbed in to the POA valve. Now it is just plumbed in to an open pipe. The reference signal is no longer right. I am presuming that the TXV bulb is ...

OP POA valves have been out of production for nearly 30 years. Your best bet is a NOS part. Classic Air shows stock on NOS Ford POA valves: http://www.classicautoair.com/POA-Ford-Valves-Home.html I would leave the York on it. Did you replace the TXV? Is it installed correctly? How about some history...

Dougflas, the way I read this is: OP bought a 2 dollar tube from Old Air products to replace a $300 POA valve. Now his A/C sucks. He no longer has / never had the POA valve. I am betting that for their next act, they will tell him the tube is more modern, and that he should swap his old 12 CID compr...

So, where did you put the oil in the A6? This is a CCOT system. Did you pull the Orifice tube & make sure it is clear? As I recall there is an issue with the O/T breaking off in the evaporator on this model. The cheap (hack) "fix" is an aluminum tube in the liquid line with compression...

Next road test, pull it down a gear and get the cruising RPM up - then check the vent temp.

I have seen a fresh "rebuild" from 4-squeezin's that needed 35 ft/lbs to break free...

.

Did a search and found a chart and it says that for an ambient temp of 90 it should be between 45 to 55 low side and between 250 and 270 high side and as u can see I only have 32 ls and 212 hs. But I feel afraid of adding more r134 to achieve the values of the chart and damage someting. It looks li...