The system includes a fuel source, a pump being operable in a first state to pump fuel from the fuel source to the engine fuel delivery system, and the pump being operable in a second state to pump fuel from the fuel source to {TAIL ~ the exhaust aftertreatment system}, wherein the first state corresponds to a first rotational direction of the pump and the second state corresponds to a second rotational direction of {HEAD ~ the pump} 
The system includes a fuel source , a pump being operable in a first state to pump fuel from the fuel source to the engine fuel delivery system , and the pump being operable in a second state to pump fuel from the fuel source to { TAIL ~ the exhaust aftertreatment system } , wherein the first state corresponds to a first rotational direction of the pump and the second state corresponds to a second rotational direction of { HEAD ~ the pump }
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