C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Quick A/C question

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Old Jul 20, 2025 | 10:09 AM
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Default Quick A/C question

How can I tell if the A/C system has been converted to 134a on a 92? Here are picks of the service ports.



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Old Jul 20, 2025 | 11:01 AM
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It’s been converted to r134a. R12 is screw type, 134a is “quick connects” like shown in the pics
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Old Jul 20, 2025 | 03:46 PM
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Originally Posted by Rttoys76
It’s been converted to r134a. R12 is screw type, 134a is “quick connects” like shown in the pics
Perfect thanks, that is what I thought but wanted to make sure. It had a low charge. Tried recharging and started cycling but then stopped. Pulled vacuum and tried charging again but won't cycle now.
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Old Jul 27, 2025 | 03:42 PM
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Defiantly R134 You got lucky
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Old Jul 27, 2025 | 09:27 PM
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I was able to get the A/C working I had to disconnect the battery to clear the codes and now it works well.
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