Hi, I was driving the truck this morning (2000 Ram 1500 5.9) when it started running rough and tossed these codes: P0300, P0302, P0304, P0308. Plugs and wires have been checked for spark as well as a new cap/rotor. I did get voltage off the injector for cyl #4 & #8 and it was around 5.7. I didn't think to get it from cyl #6 but will when i get off work or have time to Ohm the injectors.

any suggestions on this would be appreciated. I read about intake failures being a possible cause. Odd how it happens on one bank and that same time...

 

Should have 12 volts at the injectors....... But, you are getting misfire codes, if the injector was the issue, you would get injector codes..... (generally.....)

Have you fixed your plenum yet? What did the plugs look like when you pulled them?