Hey guys. Been reading alot lately I bought a used Nitro 2009 3.7 liter gas engine.....from all the reading ive done online...mostly here......i am here right now.....bought vehicle vhanged the starter and drove it home...it ran really rough....new tipm which was what I thought was wrong.....it ran good after changing for about 5 hours then acted. Like an alternator, I went through 2 of these before I realized it must be pcm.....changed it did every reset I could find( accelerator, throttle body, idlr air....) Also new plugs wires and could at this point. It runs really rougg, had a popping noise( backfiring I believe) and after a couple days messing with it u vhecked plugs and 5 of the 6 were fouled......help!!!