I've got a 2001 dodge ram 1500 5.9, runs and idles rough no power unless wot mil light flashing at WOT, code P0308is the primary, P0138 is the next one, P0300 after that. whats up, can't afford mech, and need help! I know 308 is miss fire @ 8 and P0138 is the rear o2 sensor high volt/rich. I 've got a misfire @ 2 that I ihave off and on since I bought the truck.

 

Welcome to DF.

Please make sure and post your threads/posts in the correct location. I have moved this one for you.

For future reference:
https://dodgeforum.com/forum/dodge-r...ead-first.html

 

Have you checked your plenum? (see stickied thread at top of this forum.) You have a fair few of the symptoms.