Ok yesterday I clean my body throttle on 2002 ram 4.7 SLT, use body throttle cleaner, clean around the throttle, use a toothbrush to clean inside, accelerate test the throttle without the air intake box, after putting back the intake, i notice the engine light pops on, I figure it would be since I didn't disconnect the battery when I clean the throttle. I check it out and reads p0302 Misfire 2 cylinder? No way, just for cleaning body throttle? I runs fine of course when I turn the key it start rough but crank afterwards, normal after cleaning the throttle. Every time I try to tune my truck a code pops on

 

2 cylinder is front of engine, passenger side... check to see if you didn't jostle an ignition wire loose whilst you were wresting around in there...

 

I recheck it over and the wires look fine no loose. I reset the computer probably read it wrong when I was giving a Lil gas it sort of rough to start the engine