92 - AC not accepting recharge - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-07-2004, 01:14 PM   #21
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are you sure they evacuated the system properly? If the compressor is running and the ATC shows cooling and not econ, then it sounds like maybe you have too much gas in there or there is a bad component....... Did they change any components when they evacuated the system?
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Old 07-07-2004, 02:57 PM   #22
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I'm not sure if the systyem was evacuated properly or not. No components were replaced. It appears that the system is pressurized becase when I connect to gauge hose to the low side connection port, ther gauge reads in the yellow, at about 50 PSI.
Is the high side port used for evacuating the system? Not that I want to try this myself, but I was curious what the high side connection is used for.
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John
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Old 07-07-2004, 03:57 PM   #23
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instead of switching between 2 topics, lets just stick to this thread.

I think the high side is used for evacuating the system, but I am not sure. You mention the pressure on the low side is 50psi. Is that during compressor cycling or when the compressor is off? If thats the pressure then the compressor is off, what pressure does it show when the compressor is running?
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Old 07-07-2004, 05:25 PM   #24
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When the compressor runs, the gauge drops into the green, about 10 - 15 PSI. When the compressor stops running, it jumps into the yellow zone, 45 - 50 PSI.
John
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Old 07-07-2004, 05:32 PM   #25
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Quote:
Originally Posted by John Kirk
When the compressor runs, the gauge drops into the green, about 10 - 15 PSI. When the compressor stops running, it jumps into the yellow zone, 45 - 50 PSI.
John
That sounds almost normal. Might just need some more gas to bring it up to 20 or 25PSI. Once you do that, your compressor should stay on. Do you have the temperature set as low as it can go and the windows are down?
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Old 07-07-2004, 06:31 PM   #26
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Yes. Temp is set to 60, & windows are down.
John
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Old 07-07-2004, 07:33 PM   #27
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The proper way to charge a system is by using the high side pressure, car in the shade, windows up, large fan in front of the condenser. Then it is a function of the high side pressure, which is generally 2.2-2.5 times ambient temperature. Can't do a good diagnostic from the low side.
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Old 07-07-2004, 08:31 PM   #28
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You can actually fill an AC system through the high side port??? I thought that was dangerous? I thought that was only for evacuating & venting.
I did have the car in the garage...plus, it was only 52 degrees outside.
John
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Old 07-08-2004, 07:03 PM   #29
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Default Re: Jumpering the compressor

You jumper on the connector.
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Originally Posted by John Kirk
Do you jumper on the accumulator, or on the connector?
Thanks,
John
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Old 07-08-2004, 08:47 PM   #30
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Quote:
Originally Posted by John Kirk
You can actually fill an AC system through the high side port??? I thought that was dangerous? I thought that was only for evacuating & venting.
I did have the car in the garage...plus, it was only 52 degrees outside.
John
Never fill on the high side. But DO read the pressure on the high side. That is the best measure of cooling capability.
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