i had the car running fine last night then i parked it for a little and when i went to leave it started up then just like died, the electricity was still on but the rpm's just dropped and it wouldnt do anything, after that everytime i tried to start it it would not start, it was late so i tried a jump and when that didnt work i just got it towed but this morning it started right up every time. can someone tell me what this could be? im guessing fuel pump but i dont know. thank you.