I have a 07 Durango w/ 5.7 hemi, my wife went to get gas and when she got in to leave the car wouldn't start. I towed it home with the truck and am now stumped. The car cranks but won't start. I started by replacing the 4.5 year old walmart battery, then the crank shaft sensor on a whim. I finally replaced the fuel pump relay and after the relay in started! It seemed to run okay that night although we didn't really go anywhere. The next morning it wouldn't start again. I tried switching out the relay again and no luck. I'm really hoping it's not the fuel pump because it's full of gas. Any help would be really appreciated! Thanks