1991 Corvette A/C question
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Instructor
Joined: Sep 2014
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1991 Corvette A/C question
The usual thing happens the ac blows warm. I go to check it and the low side R-134 adapter is leaking. I scan a few threads and figure out the car has a diagnostic code of 09. Bolted on a new adapter hardly anything came out of the port. Quickly bolted the new one on and tried to slap a charge in it. Unbolted the battery to clear the code. Added guages and the low side is reading zero psig and the high side is around 75 psig. Obviously that is low. I have the low side switch jumped out to make it drag the refrigerant in. When I shut the car off pressure bleeds off and both sides settle in at about 74psig. What gives why am I not seeing pressure on the low side at all when the compressor is turning? Anyone have any ideas how much this thing should take till the low side starts to show anything?
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
How did you determine the leak was at the low pressure service valve?
Most likely all the refrigerant leaked out.
You need to pull a vacuum to remove any air that may have been pulled into the system due to the leaking service valve.
Most likely all the refrigerant leaked out.
You need to pull a vacuum to remove any air that may have been pulled into the system due to the leaking service valve.
Thread Starter
Instructor
Joined: Sep 2014
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