I did my third smoke on my Cajun injector electric yesterday. My first two were ribs that came out great and a meatloaf that was worth doing again. So for my third smoke, I decided to try a boston butt following Bear's step by step. I was also using my amnps for the first time while cooking. I had tried the amnps in my smoker already just to make sure it would burn good enough to not do a mailbox mod. Four hours in I inserted my mea therm prob, 118 degrees. Bumped temp up to 240. An hour later, IT at 121. To make a long story shorter, I finally removed the probe stuck it through a piece of tater and set it on the rack next to the butt. Injector readout was 240, acurite readout was 215. I did the boil test, 211 boil temp. So today I cleaned the smoker, put the probe back in on the second rack and turned the temp to 275. Smoker readout. Acurite readout 115. 116 151. 154 181. 188 210. 211 241. 239 261. 259 275. 270 I hadn't cleaned the smoker before I used it yesterday. Could the factory temp probe being dirty affected the temp reading? This morning I also thought about the amnps. It sits against the left side of the cabinet while the cabinet probe is in the top left corner. Could the smoke and heat off the amnps have risen up the cabinet wall and affected the readout? Any help and ideas are appreciated.