Question about 1994 Chevrolet C1500
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Posted on Jan 02, 2017
Do you have the old compessor? Drain out what is in there and use that amount as a guide + 1 oz. There is no ratio per se. As long as you are close without being crazy low (none) or crazy high (over flowing), you're good.
Posted on Apr 14, 2009
unless you can verify what the pressures are you will need to have a shop check it for you. Low pressure will give the symptoms you stated. Also if you did not vacuum all the air out before you added the stuff then a shop will have to perform a a vac and recharge. Plan on paying the piper if you did not do this yet. You can only accurately charge a system after a vacuum has been put on the system and then held there for a time to see if the vacuum stays.
Posted on Jul 07, 2010
somewhere around 1.6 pounds (1lb.14ounces) of R134a if system is evacuated and 3 ounces of oil with new compressor.
keep pressure on the low side around 34-37psi & it should blow snow. Below are normal car AC pressure readings with 134A.
DIY recharge kit:
With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold – STOP don’t overcharge the system.
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Posted on Jul 19, 2010
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