Hi there, I was wondering if anyone would know what would cause an arc from the spark plug wires at the distributor cap. I got new spark plugs, spark plug wires, ignition coil, and distributor. I have been trying to figure out why it has little power off idle, and in the dark I was revving motor in garage and noticed arcing from the wires to the cap. The distributor is not very old, maybe a year or so and I only drive the car in the winter.

Thanks!