Same leak experienced...only after an a/c recharge.
Hello, this is an old thread, so I don't know if there will be any hits but it is worth a shot. My wife's MO's a/c went warm a few days ago and with triple digit heat and a black interior it gets too toasty without the a/c. I decided to check the a/c's psi and it registered a little low. I proceeded to add some 134a w/ oil only to bring it up to about 45 psi. I let it run for a bit to see if it would cool properly, and after about 5-10 mins of running on max a/c, I turned it off and went inside the house.
I came out and found a large puddle right underneath the car's heatshield (or where I, a nonmechanic would perceive the heatshield to be). I checked the liquid to see if it had that acrid refrigerant smell or color, but it had not smell or discoloration. It also dried promptly leaving no residue on the concrete pad. I thought it was a/c discharge resulting from the increase pressure from the recharge (I live in a relatively dry climate with low humidity and can't reasonably believe that the puddle resulted from condensation after only 5-10 mins). However, my wife took it for a drive and upon start-up coming back the air was warm again.
I think we have a leak, which stinks due to timing (just graduated from grad school and am taking boards, unemployed, baby coming, etc. and hope to find some self-help remedy or at least self-diagnostic help so that we only have to pay for repair and no diagnosis. Any help is appreciated.