I have an 2007 Dodge Ram 1500 TRX4 4x4, 5.7 hemi. Went to crank and it idled really rough and then shuts off. It did have the lighten bolt code, so I replaced the throttle body and cam shift sensor, but still the same. It will crank, run really rough and then shuts off. Tested fuel pressure, it pops up to 60psi but fell off real quick when it should hold the pressure for atleast 30mins from what I've read. I have now replaced the fuel pump but it is still doing the exact same thing. Scanned for codes which is telling the electronic throttle body. Any ideas??? Love the truck but this is a pain in the butt

Run an additional ground wire for the throttle body.

If you have a decent scanner, so what it thinks pedal position sensor is telling the PCM.