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Thread: R134 VA system charging,
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05-01-2019 #24
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- Nov 2006
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- Mountain Springs, Texas
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VA runs different pressures to compensate for the smaller evaporator as far as I know. The lower pressures have less margin for error as far as I know and that is the reason for precise charging by weight.
When you measured your pressures did you have the windows rolled up and the fan on max? A large fan blowing into the front of the car will help a little too.
That being said I’ve installed quite a few VA systems and I don’t think I have ever seen 6 psi on the low side. Curious if anyone has...
I charge by weight per the VA instructions.
Don1969 Camaro - LSA 6L90E AME sub/IRS
1957 Buick Estate Wagon
1959 El Camino - Ironworks frame
1956 Cameo - full C5 suspension/drivetrain
1959 Apache Fleetside
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