A/C Port Pressure Explained High vs Low for Optimal Performance

Well the low pressure is in front of the manifold and the high is on the passenger side of the bay, plus the port sizes are different, so it's ... Typically the low pressure port is located close to the AC accumulator and not the compressor although it is possible as this is a conversion. 250psi isn't too high. The a/c pressure switch turns off the compressor if the pressure is below 28psi or higher than 460psi. Preview image for a collapsed post. ... From the FSM: ... On the 1.4L engine, the high side service port is located on the A/C suction line in back ... The low pressure side is the return line between the cabin evap and the gas compressor upfront near the drive belt. Typically, when the pressures are equal, and the compressor is engaged, then the compressor is bad. That said, those compressors don't usually fail internally ... I rented the gauge set at Autozone and compressor off,I had approx. 95 psi on high and low side. Compressor on, low: 45-50 high: 198-200 and ... Hi the low pressure port is located on the accumulator, just above the low pressure switch. see attached picture. graphic. Item, Part Number, Description. 1 ... The low-side service port is a quick-connect fitting that provides access to the low-pressure side of the A/C system. 80-100 psi with the engine off is OK. The system just settles out and the pressure equalizes. When you start the engine and when the compressor turns on the 15 ...