Engine Size: 3.8
Refrigerant Type: R134a
Ambient Temp: 70
Pressure Low: 60
Pressure High: 170
Country of Origin: United States
When using an a/c manifold gauge set to test your car's a/c, what would be the correct rpm's to have your car at when reading both low and high side pressures? My car's idle speed is 550 rpm's. Is this a good enough speed or should the rpm's be higher than 550 to get a correct low and high side pressure reading?
I've always used 1500 - 2000 rpm
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