Yes!!! I figured it out. As I started to take the pump apart I realized I had cleaned it before…..anyway, I took the impeller out along with the rod, little washer, and rubber bushing. Everything looked clean and dandy. Then I checked the silencer and air tube – no probs there. But then, I noticed a rubber washer in between the pump and canister, and when I pulled it out – there was a little hole that was being blocked – coming right from the air tube inlet. That was it! I wasn’t getting any air vacuum because of the washer. I believe what happened was when I bought a replacement fitting I had an extra washer and stuck it in there were it shouldn’t be. Doh!

Thanks for everyones advice.