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Depends on how it's programmed. Electronic motors can be set up with an idle shutdown timer which can be set at whatever interval the person doing the programming wishes. If there is no idle shutdown timer, the truck can idle until it's out of fuel. Idling is not a recommended practice, however - at low idle, insufficient force is generated by the pistons to force all of the carbon (a byproduct of fuel combustion) out of the pistons, and the end result is a carbon ridge which forms at the top of the cylinder.

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12y ago

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