alright so i bought this 02 dodge ram with a 5.7hemi swap it has headers cold air intake dyno max exahust.. all i can see for after markets.. i juat put a new battery in plugs waterpump air intake temp sensor i drove the truck for about an hour highway speeds came into town and it started to shudder and misfore p0300 random misfire only at low speeds.. dis this for about 3 days came up bad 02 sensors bank 2 upstream and down stream i replaced both with ntk but now it does it all the time.. i can clear the codes. unhooking the battery. and it runs fine for about 3 mins the it goes right back to misfiring any ideas.. or a place to start

 

Check the wiring for the O2 sensors.

 

traced the wires as far as i am able to no breaks no frays nothing i can disconnect the battery and thw truck runs fine for awhile anywhere from 10 mins to an hour on thw highway untill it slows down o2 codes come bavk instantly after hooking battery back up

 

Codes? Could be the other two 02 sensors