Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
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Can you tell me what your pressure readings are on the high side as well?
Okay it is pretty important that we have them , normal pressure on a full system with the AC running should be right at 35 to 40 PSI on the low side and right at 200 to 210 PSI on the high side. As it stands ring now your low side pressure is to high which would indicate that you are either over charged or there are other issues and that where we would need the high side reading to determine the cause. If you can get theses reading We can work from there.
If the high side is reading high @70 PSI your either over charged or the compressor is failing but there is no way to know this for sure with out knowing the high side readings. The orifice tube is is the liquid line. See the link below.https://dl.dropboxusercontent.com/u/104923897/Orifice%20Sept%2015.pdf
In most cases if the orifice is plugged the low side pressure will go into a vacuum due to the lack of flow. That being said if the compressor is damaged the orifice should need to be replaced at the same time along with the accumulator and a complete systems flush.