Doesn't the Vortech have a closed oil system? May want to check the last time that was changed out. Having the resonator installed should not cost all that much 50-60 bucks over the cost of the resonator too get installed. Depends on how much you think getting ride of the drone is worth. Some might say that if it will put you in a better mood on your vacation then it may be worth it.
2001 ZX3 2.0L Zetec-
Hatch Nation #42
Going through Rebuild See "The TICK Build Thread" for details (http://www.focusfanatics.com/forum/showthread.php?t=289168&referrerid=62897)