Ok so now that I have a new pump and my airmatic is working well, on to the next issue. I have a rattling noise coming from right under the drivers seat area underneath the car. This only happens between 1 and 2000 rpm when I initially start driving the car. After driving for a few minutes the sound goes away. Sounds like coins or nails in a tin can. Im thinking its one of the cats. Any advice is greatly appreciated.

 

Maybe your catalytic converter is going bad.