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Corvette95 · 3 Weeks Ago

In my experiece is unless it is totally out, the compressor will kick on as you add the 1lb. If it doesn't start you can unplug the pressure sensor on the a/c line and jump it to manually start the compressor. I am not 100% sure exactly which plug it is as I would refer to the FSM if needed so it would be good to look up the exact plug location just in case but I think you will be fine getting it to come one with just the can of freon when you crack it open. I still run R12 too.

3 Weeks Ago	#2
Corvette95 Join Date: Jan 2006 Location: Decatur, AL Posts: 1,105	Re: 1990 AC question In my experiece is unless it is totally out, the compressor will kick on as you add the 1lb. If it doesn't start you can unplug the pressure sensor on the a/c line and jump it to manually start the compressor. I am not 100% sure exactly which plug it is as I would refer to the FSM if needed so it would be good to look up the exact plug location just in case but I think you will be fine getting it to come one with just the can of freon when you crack it open. I still run R12 too. __________________ Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454