99 ram misfiring
New to the forum and hoping to get some advice on my 5.2 L. Bought this truck a couple months ago and haven't had to many problems with it besides a leaking water pump and ex manifolds which I've replaced. Until recently it's started misfiring but only when driving it sounds good just idling but when I drive it especially in a higher gear at lowing rpms or on an uphill it has quick jerks like very short lapses of power. At first I thought it was a clutch issue but I believe it's in the engine, I also had some sputtering at one point while driving. I put new Bosch copper plugs in it yesterday (fairly cheap plugs) and this did not seem to help much or any. Should I go ahead and replace wires next or was going with cheap plugs a bad idea. It did throw a misfire in the second cyl code but it's not throwing it everytime I drive it only certain times. appreciate any input thanks for reading.