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Leaving the IS On.

471 Views 3 Replies 3 Participants Last post by  NDNRoMeO82, 
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How long can you safely without damaging anything leave the IS with the engine on ? Sometimes I go to pick my gf up from school and she is late and I sit in the car for maybee 30 minutes to an hour, and here in Texas its Hot, so i leave the car on for the AC till she comes.
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If the engine's running, you're not damaging anything anymore than you be if you were driving - just wasting gas. Your alternator could probably take a beating though, since it's getting less charge than if it the engine was running at higher rpms...
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