I have a 2006 LLY with 16,000. After installing a tts 4inch cat back, and driving around for a week i wanted to have more noise, so i removed the muffler and installed a 4inch piece of pipe. I noticed that my engine temp in 30-45 Degree weather is going up to 196-210 with no load and its staying there. Even just driving around town it is staying there, where before it wouldn't go above like 170-180. Im concerned that when it starts to get hot out or im pulling a load its going to over heat. What would cause this to start after removing the muffler. Thanks for any help