Hi, my AC is weak, almost no cooling for the first 10 minutes and after that its ok but not great. With car off pressure is 74 low side and 65 high side. With car on I get about 80 low and 75 high. From what I read its not pulling a vacuum or creating pressure and its a bad compressor. Since it does work somewhat after a while driving around, I want to make sure it's not just a bad variable displacement valve in the compressor before I buy a new compressor, condenser-dryer, expansion valve and flush. The valve is only $25 on ebay. My clutch is engaged and fan is blowing. My car only has the fan on motor side of the radiator, doesn't have the auxiliary fan in front like earlier models.
Any chance it's just the variable displacement valve and not the entire compressor?

Thanks