[4Wheel]

Pull the check engine codes, even though it may not be throwing a CEL there still may be codes that might shed some light on you symptoms.
Make SURE the gap of your plugs is set properly and the timing is perfect.
there is a jumper (year of vehicle?) that needs to be in place when checking timing.
If you have an intake manifold gasket compromise this will cause your symptoms also, their should be a "lean air fuel mixture" code.
Try a set of factory recommended plugs for the ell of it and see what happens Nipondenso. also I have had multiple problems with after market plug wires installed factory sets and problem cured.