Okay long story short..My front tank fuel pump quit working. So I switched to my back tank and now my truck wont run right..Its will start. But it it has no power and no RPMs..It just spit and sputters again with no power..Any help will be greatly appreciated

 

Rear pump could be failing, or have a plugged filter sock. If the front fuel pump module has failed, the rear pump can be pumping fuel into the front tank, starving the engine.

 

Time for a new pump and filters. Do a search. There are lots of threads on this. Good luck and welcome to FTE.