Hey all, my Mazda B4000 has been running rough. Feels like i have a miss firing cylinder. I replaced the spark plugs and it worked great for the rest of that day. The next day I started it up and it was back to its old way. The wires look good so I dont want to spend to replace those unless there are people saying that I should, so other than that what should my next action be? I just had the cam shaft positioning sensor and the syncro unit replaced, not sure if that might have something to do with it.