on the low side i am seeing about 40psi the high side varies it goes up till about 150 psi according to my ac machine. My scanner shows 65psi for refrigerant pressure.. i have charged the system with 36 ounces but when i turn the car on and ac on i activate the high speed fans with my scanner and the low side drops to about 20 psi to 10 psi
if i turn the high speed fan with the scanner it cools properly the compressor now is not turning off or on just on but it will open relief valve in a couple of minutes and let out all the freeon.. 240 psi on the high side right?
i am going to recharge the ac again and look at the high side how far it goes up until the relief valve opens up... is the high side of the fan controlled by the front control module and the low speed by the pcm?
i did check those wires one had 5v the other had ground and the third had 3.4v with connector disconnected.. i checked the pressure on the high side on scanner it got up to 211 psi high side and on the ac gauges it got up to about 215 and the pressure relief valve open in the compressor and let out all the r134 out again
i dont have one but will get one tomorrow i just received more info on the car that they changed the expansion valve because it was not cooling enough
i called the dealer they dont offer the pressure relief valve neither does the auto parts store
i just order a compressor i will let u knw how it goes compressor was bought at auto zone new...
okay i replaced the compressor with an oem one and it did the same thing..