Please Help

Today i was driving to school and all of the sudden the motor dies and i coast to a stop.. I tried to start it a few minutes later and it would just barely crank.. i gave it about 15 minutes and it would just keep cranking but faster now than before. i got it towed home and immediatly came here. i read some of the posts and read about the EFI main relay so i went out and got a new one. I just replaced it and it is still just cranking.. it clicks twice and just cranks... the battery is fine and i dont no what the problem is.. Please Help..