AC Pressures(Low/High)??? - Chevy Impala SS Forum
 
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post #1 of 4 (permalink) Old 09-13-2016, 04:14 PM Thread Starter
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Question AC Pressures(Low/High)???

Good day guys!

Im working on recharging the AC System on my 96 Imp and need a little help from you guys...Can anybody post the specs on the AC Pressures for our cars please? Both Low Side and High Side with respect to Outside temperature and if possible, what the gauges should read when the Compressor cycles. I've been searching for them for a few days in the forum and online now and havent been able to find them posted anywhere and I only have Book 2 of the FSM and these numbers are in Book 1. If anybody has Book 1 and could quickly look this up in the FSM and post them here it would be greatly appreciated.

Thanks in advance!
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post #2 of 4 (permalink) Old 09-13-2016, 10:44 PM
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Quote:
Originally Posted by 9SSixImp1911 View Post
Good day guys!

Im working on recharging the AC System on my 96 Imp and need a little help from you guys...Can anybody post the specs on the AC Pressures for our cars please? Both Low Side and High Side with respect to Outside temperature and if possible, what the gauges should read when the Compressor cycles. I've been searching for them for a few days in the forum and online now and havent been able to find them posted anywhere and I only have Book 2 of the FSM and these numbers are in Book 1. If anybody has Book 1 and could quickly look this up in the FSM and post them here it would be greatly appreciated.

Thanks in advance!
I open all the doors ac on max , the idle I set to 1000 rpm . add refrigerant until both fans come on. then just check low side so its 40-45 psi. this is for me perfect charging procedure .

the reason I do not check the high side is it can leak at the test port and that cannot be cheaply repaired so I avoid that on this vehicle and use the PCM sec fan turn on to indicate the systems charge as well as the amount I put in if no charge. this is done @80deg F.
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post #3 of 4 (permalink) Old 09-14-2016, 01:02 AM
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post #6...I posted a pic from manual of pressure(s) chart. It's cutoff @ bottom based of rpm of 2000.

https://www.impalassforum.com/vBullet...l#post11867217
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post #4 of 4 (permalink) Old 09-14-2016, 06:13 AM
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Charge by weight, not by pressure. Pressures are very conditional. Weight is static.
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