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Need some pointers for recharging A/C

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Old 08-13-2006, 04:24 PM
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Default Need some pointers for recharging A/C

I'v looked in the service manual about recharging the a/c compressor. Says to add freon untill the temperature from the vents get in the 40-45 degree zone. Right now its at 53 degrees before adding freon, I doubt it will take the whole 12oz can of it. I'v never done this before, I only have a regular hose kit for this that doesn't have a guage. How much time should I go between adding freon and checking the temperature, and does the valve where it hooks up to the low pressure pipe fitting close off the freon flow when I unhook it?
Old 08-13-2006, 04:52 PM
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According to the AC performance chart in my '01 helms 53* is within limits. Charge (pressure) depends on the ambient air temp and humidity also. For example:

86-95* ambient, 30%+ humidity = 42-46 psi, maximum left center discharge air temp = 68*F.

You really need a gauge, don't want to overcharge it.
Old 08-13-2006, 05:01 PM
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Originally Posted by 2001NBMZ28
According to the AC performance chart in my '01 helms 53* is within limits. Charge (pressure) depends on the ambient air temp and humidity also. For example:

86-95* ambient, 30%+ humidity = 42-46 psi, maximum left center discharge air temp = 68*F.

You really need a gauge, don't want to overcharge it.
Well, my helms book is for the 93 to 96 f-body, I have a 3.4 v6. So I cant go by just temperature alone?
Old 08-13-2006, 05:13 PM
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OK, yours is different. Is this what you're look at? This is for a '95 http://shbox.com/1/ac_performance_chart.jpg




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