Engine Size: 4.3l
Refrigerant Type: r134a
Country of Origin: United States
how do you check manifold gauge set for a leaking condition?
Pull a vacuum on them (gage wheels open) and shut them off (gage wheels closed)- watch vacuum gage (low side). assuming you have the 134a quick connect check valves on the car end.......
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
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