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that info is located on the dryer in the form of a label. but if the system is truly empty there is a problem in the form of some kind of leak. also if it is only low and you add to much the system will freeze up and wont work. good luck

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โˆ™ 2015-07-15 19:39:24
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Q: How much R-134 do you put in an empty AC system of a 1990 Toyota 4Runner?
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