Quote:
Originally Posted by Ric5 Adjust the truss rod. |

You have no idea how his truss rod is already set!
Robertron, you should seriously consider bringing it to a professional technician to get checked out. You may need a nut slot adjustment and possibly a shim. Nobody here can help you unless we know exactly what is up with the bass, and even then, you're best off with a knowledgable pro who can actually look at your instrument.