ok when the truck is running i pulled the #1 cylinder plug wire the truck bogs down. now when i hook it back up and pull #3 or #5 or #2 the truck stays the same like maybe there not even working to begin with? any ideAs? what should i check ?

 

forgot to mention that the truck runs rough and i replaced cap rotor wires plugs fuel pump o2sensor. and exauhst smells strong with gas. and it sounds as if the truck is miss firing while its idling or running. but i get no code? or cel and the cel light does come on when i fist turn the key like its suppose to.