I think you guys have nailed it! I once did a quick recharge with the Walmart kit and got exactly this result. Then, I got the Harbor Freight AC servicing set up, and did it properly, VOILA, it works as new now. Another HF tool well worth having, as I have done all 3 of my cars, my brothers, and friends, with good results. This HF manifold connects to both the Hi and Low pressure valves and optimizes the pressure, whereas the Walmart type connect only to the low and often mucks up the system.