Yeah, I checked the valve that punctures the can to be sure it was unseated - I actually cracked both of the valves in the hose (the one that pierces the can and another that is a shutoff valve) and heard gas escape from the end of the hose that connects to the AC low pressure line nipple.
As far as the air blowing out of the vent goes, I don't have a thermometer yet, but the air doesn't even feel cool and the pressure lines are not hot or cold, no condensation anywhere.
I repeated the whole procedure, this time allowing the compressor to run for 7 minutes with the can of r134a hooked up - same results. I'm still stumped.
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Ten Sleep 1980 245DL 1995 850 Turbo 1997 Dodge Dakota 5.2L
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