Strange Engine Noise

[lifeline830]

Recently I have noticed a strange slight rattling metal sound when my engine runs at around 1000-1500 RPM, more noticeable in reverse. The sound is heard best when passing objects on either side (for sound reflection). I have no idea what it could be. Does anyone know what this can be?

[MazdaSpeeder]

Didn't you just ask this here (http://www.mazdas247.com/forum/showthread.php?t=123714019)? If you want more answers, post in your original thread and just say "bump" It will bump your thread to the top of the unread list and more people will see it. Also, do a search for heat shield rattle, engine rattle, etc. I know there are some threads on this.