It starts, the engine turns over, but dies within 1 to 2 seconds. when the car first wouldnt start, we replaced the spark plugs, because we saw sparks when cranking the engine. we replaced the fuel pump relay and the fuel filter because after we replaced the plugs, it didn't seem like we had any fuel going to the engine. I dont know if it has anything to do with it, but it is minus 5ish on an average day, and we added gas line antifreeze to the tank. we've had to charge the battery a few times in the process. also, the battery reads 12-14 volts on the charger, but 8-10 on the dash. our current theories are the fuel pump, battery, or alternator. as well, bout 3 to 4 days before this started, we gave someone a jump with our car... could that have caused the problem?