I recently performed a basic tune-up with a new cap, rotor, and spark plug wire set from DMCH. After triple-verifying the order of the wires and putting it all back together, there is now a distinct "ticking" sound within proximity of the distributor cap, which has no pattern that I can tell. The "ticking" affects the RPM at idle as it makes the engine stumble momentarily. It's only noticeable at idle. The engine runs great otherwise. It definitely sounds electrical. Has anyone encountered this before?
Here is a video of the "tick:" https://youtu.be/rV_-WNTXC7U
Thanks!