Mike, I'm glad you posted this...I'm having the same problem. Had the system charged, but the guy didn't use a guage. Seemed like he did put a lot in, but the little window never did clear up. Now, when I am accelerating, the air isn't as cool as when I am coasting. Also, after it was charged, the AC eats up MAJOR horsepower and MPG's. 27 without AC, about 20 with. Maybe it's overcharged?
Thanks for your post.