Hello everyone! I'm new to this forum and was hoping someone could help me. I recently purchased this truck after selling my Dodge/Cummins. I noticed sometimes when I turn the ignition on, there's a noise that I would assume is the fuel pump building pressure. Then, when I turn over the engine, it fires right up. But then after I shut it off and go back to start it later, the noise is not present and the engine just cranks without firing unless I push the gas pedal to the floor and then it starts. Almost like the fuel system loses its' prime. Does anyone have any ideas? By the way, there are no trouble codes present. Thanks in advance for your help.