J-Groove, If that valve doesn't do it and sometimes you can hear the pump working right after you start the engine ( 30 seconds to a couple of minutes more or less) you might consider checking\ resoldering the contacts on the relay control module. It has a relay in it that controls the secondary air injection pump. It could be an intermittent connection in the solder joints. Search relay control module on this forum and read all about it. Tighed1 will solder it if asked nicely for beer money and postage. Contact him if interested. Just a thought before you buy expensive parts.