i think i have some kind of problem in my ignition system. my 86 N/A 300zx has lost so much power and it also rus very rough and therefore loud. it especially accelerates poorly from low rpm where, you can feel the engine almost misfiring. it is almost as if the spark is jumping elsewhere than to the plugs. all of my problems are exaggerated when it is humid or rainign outside...sometimes it is even hard to start. help me! ignition coil maybe? plugs, wires, distributor rotor and cap and so much other stuff.