I have a 2000 dodge durango 5.9 liter 4x4 and I have replaced the fuel pump but it will not crank. What is wrong? The check engine light does not come on so I figure that it is not the fuel injectors. But it seems to me that it is not getting gas to the engine. Because I can pour gas in the carb and it will only start and run for like 5 seconds so I do not know what else it could be.