Automotive Air Conditioning Information Forum (Archives)

russharv63 on Fri June 17, 2011 2:55 PM

Year: 1993
Make: Ford
Model: Taurus
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?

Cussboy on Fri June 17, 2011 4:01 PM

I've always used 1500 - 2000 rpm