Funny question losi_racer....have you ever cleaned the tip of your temp gun ? ive found a little layer of grunge on the "eye" every once in a while and can cause Extreme differences in temp...like a normal running motor temps at 275+ when the motor IS NOT 275...and once you clean it whamo 210-220 like its supposed to be...i have a specific paint brush i use for cleaning the Tip's of my guns that i keep in a Zip loc in the pit box.