I have an 03 ram 1500 5.7 . 2 months ago, I replaced fuel pump, regulator and all filters. My 02 sensor white wire came off which I repaired. For 2 months everyhing was fine and one evening after work, I was driving home and the engine started to miss. I saw the fuel pressure drop to below 40psi and made it home. So far, I replaced the pump which had no effect. I found a vapor line from tank to cannister off -re-connected but no effect.
02 sensor is new and everthing looks good. Fuel pump relay good, voltage to everything good. Tried clearing codes and diconnecting batt- still not right.
If you have any advice, I sure could use your help.:ugh