I had the same problem. In addition to the air pump, you may need to replace 1 or both of the 2 solenoid valves on the exhaust manifolds. When moisture gets into this air injection system it ususally ruins the valves as well as the pump. Also, there is a kit (upgrade) available for the pump air intake that will prevent moisture in the future. The valves were about $240 each and the upgrade was about $50.
Thursday, November 6th, 2008 AT 10:27 AM