Again Thank you guys for your help. I think I resolved the problem with each of your assistance. I changed my fuel to 10% since I needed some anyway. I found that I didn't have the problem when I shut off the on-board glowplug heater. I think it may have been causing the pre-ignition. I think the general nature of my engine is to be a little on the finicky side so I am just going to have to learn how to tune it right.

FYI: The cessna 182 is great flying plane!!! I did the most beautiful 3-point landing I have ever done this afternoon and in a 70 degree crosswind at that.