A/c compressor discharging while filling

[CanuckQx4]

Hey guys, I had my a/c compressor lines disconnected and had the compressor removed for a number of days doing my engine swap, so I assumed I lost my "charge" in the process. So today since I had a can of Duracool laying around and I have the fill tool/gauge from previously recharging the system I decided to put it in.

I followed this video exactly, skip to 1:30
https://www.youtube.com/watch?v=c3dTSGXWI3U

All seemed to be going well, the system took in the contents of the can, the a/c started blowing pretty cold, and then the video says the rev the engine and hold rpm to circulate, as soon as i did that, I hit about 1600rpm and the compressor made a weird noise and made a discharge of compressed air noise. I didnt notice at first, tried revving again, it discharged again, I let the rpms fall and noticed the air wasnt blowing cold anymore. Looked under the car, and sure enough, some green fluid had purged onto the floor.

Im not to worried about losing the can of fluid, as its been in the garage some years, but Id still like to fill this system and not have it discharge on me, should I just avoid revving the engine? All seemed well before I did that, but obviously if I were to be driving the truck the rpms would rise.

What do you guys suggest?

[Towncivilian]

I always stayed away from those "charge in a can" type things. For best results you really should have a set of proper gauges to read the high & low sides to get a better idea of what is going on.

Be aware that perhaps the can of stuff you used probably contains compressor oil, but it may not be the proper type - I don't think the oil is universal.

Sorry to not be of much help here, I don't have much hands-on experience with A/C.

[Chuck Tribolet]

You should have pulled a vacuum before your charged it, but that's not your problem.

You've got a leak, you are going to have to track it down. It's that simple.

Chuck

[CanuckQx4]

What makes you think i have a leak?

[Slumpert]

Replace the dryer the o ring on the connections you unplugged, pull full vacuum for as long as you can and then refill with the correct amount of freon.

[Chuck Tribolet]

What makes you think i have a leak?

It piddled green oil.

Chuck

[CanuckQx4]

That came out of the discharge valve hole, no other places.

I did also replace the o-rings on the 2 main lines bolted to the compressor