Long Idling

In another thread the idea of idling the Tacoma for long periods to get 120 volt power to the rear receptacle came up instead of using a generator. The discussion was on if it harmed the engine . So as not to highjack that thread here is some information.
http://www.makealeap.org/idling_myth

http://autorepair.about.com/library/a/1h/bl151h.htm

http://www.hcdoes.org/airquality/anti-idling/idlefaq.htm