I removed my vacuum advance/retard thing from the distributor today to verify that the arm that moves the timing was moving under vaccum pressure and on the #1 hose(see attached pic) and it moved. On the #2 hose there was no movement with vaccum applied. Next I held vaccum on #1 and appled vaccum to #2 and slight movement occured but barely noticeable and din't hol the position for more than 1/2 of a second. Do I need to replace this or is this normal. IF so is there a part # on fastlane?