I'm somewhat new to the diesel word, and learning more each day. I've noticed that since I have modded the truck some that the engine temp fluctuates. Normal driving empty 190- 200. When I get on it, still empty, it will climb up to around 210-220. Is this normal for a modded truck? I have added a cold air intake, Donaldson muffler, and Quadzilla economy module (60HP).