Join Date: Jan 2001
Location: the Great White North
Replaced AC compressor, will not engage
Compressor on my SS locked up awhile ago. Happened when I was topping up system after winter storage. So, when I was working on it last fall, I swapped out the compressor for what I thought was a good used/rebuilt one. Pulley free wheels fine, I can grab the clutch and turn over the compressor without issue. Connector is plugged in. I did new rear seals.
Vacuumed out the system (I have a pump and gauges). It pulled down to negative 30 inches, and held for a few hours without moving. Great, no leaks. Time to fill. Started car, turned on AC, connected a can and the vacuum pulled some in right away. Compressor did not start.
Double checked fuses. Disconnected the low pressure switch connector off the accumulator. Jumped it. Compressor does not start. I do hear the engine increase slightly in RPM, so I'm sure the PCM is getting the AC on command. I've never had one that DIDN'T start with the jumper wire.
Any ideas for me? Am I missing something? Or, is it just "take it apart again and throw another compressor in there"...
Old cars, just like classic rock... 60s, 70s, 80s, and 90s!