Engine Size: 5.0 V8
Refrigerant Type: R134A
Ambient Temp: 88
Pressure Low: 50
Pressure High: 250
I just put in an entirely new system. Compressor, 2 hoses, condenser, evaporator, orifice tube and accumulator. All the parts were new so I didn't flush.
I added 8oz of PAG46, half to the compressor and turned it manually about 20 times, let it sit on its front gasket to soak the seal for 10 minutes, and then added the other half of PAG46 into the accumulator figuring it would cycle through the system from there.
I pulled vacuum for an hour, and the system held vacuum. I charged to the spec of 1lb 14oz (30oz) written under the hood, 98 Ford Explorer 5.0L V8.
The AC blows cold but there is a lot of condensation on the accumulator and down the entire hose to the compressor.
Today its 88 degrees ambient with 70% humidity.
Pressures with the engine on and compressor off equalize at 115 on both sides.
Pressures with compressor on are 48 low and 250 high, with the high needle vibrating a bit.
Can anyone advise what might be wrong?
At what RPM is the engine running?
Sorry forgot that. These pressures are parked at idle. The engine idles a little fast though, but no more than 1500 rpm.
Condensation is good, those parts do get cold when the system is operating properly. A few cars had insulation on the accumulator, but Ford and GM generally decided that was more trouble than it is worth.
I would expect the low side to drop if you rev the engine a little.
Edited: Thu July 03, 2014 at 9:46 PM by mk378
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