I've since found out that the intermittent clicking sound is not when engine
is running...but when key is turned to #2 position (warning lites on,engine not running). Radio,climate control,etc off, but it sounds as if a relay (?) is trying to switch
on or off when I turn key to #2 position.Inside car sounds like noise is more behind climate control/radio area.
With hood open sound is from center/bottom of engine.Strange.All electrical
working ok(although I do need to replace ingition switch)...just curious.