Hi everybody, I am new here, I recently bought a Cad deVille 1997 4.6 279 hp Having a lot of issues with this car. For a start, can somebody tell how much content the airco system needs? it now contains 570 gr. The airco also remains on Econ, no matter pushing the auto button. The compressor wil run on connecting 30, 87 and 85 of the AC relais. There is also a message on the BC ACM B1983 history, is this message related to the problem?