Unplug all spark plug wires from the plugs, leaving them connected to the distributor. Wrap them thoroughly in rags and get them as far away from the engine as you can.

Remove your fuel rail from the intake manifold, keeping the injectors and supply/return lines in place. Set it atop yet more rags, and have a friend crank the engine while you watch the injectors. I'm guessing the results will be... fascinating.



By the way, in referring to cylinder #4 are you counting from right to left or left to right?