My car is shaking like crazy, it has a really bad idle, if i unplug the #2 spark plug wire, it runs fine, no power, but runs fine and no shaking, if i unplug #3, it does nothing, idles the same way. If i unplug #1 or 4 the car shakes even more and wants to stall. So i guess something is wrong with cyl # 2 or 3, i tried changing the coil packs, same problem.....All the cylinders have spark and checked the fuel injector wires and they also all fire. If anyone knows whats wrong, let me know.