1999 Plymouth Neon car goes dead

My neon goes dead driving down the road. I have changed the cam sensor and the crank shaft sensor on the car but it is still going dead then wont start back up. What else could be causing this. It sounds to me like it could be the fuel pump going out but I pray to god its not. When we do get it running and hit the gas it goes right back dead. I called dealership but cant afford 850.00 repair if it is the fuel pump. Please help! Thanks so much