Wires are new, cap is new. All the other plugs look fine tan color as expected, except 1 and 7. Hoping the fouling was just the winter short startups. I used a timing light and looked at each spark plug wire to find out which cylinder had an intermittent fire and 1 and 7 were skipping noticeably. The timing is right on as well. After I replaced those 2 spark plugs, car ran great. Yes the bang was the backfire heard from the front and exhaust. I drove the car to work today and will pull out one of the new plugs to see if it's ok or looking like it is fouling again and report back here. Thanks!