It was going good until

I was headed home yesterday, getting 18.4 mpg, taking it easy. Stopped at a stop light, took off and engine started to shutter under a load or when going up hill. Suspected that I was losing an injector, still all stock injectors, so took it really easy the rest of the way home. Got home pulled out the infrared thermometer and checked the exhaust manifold ports for temps. Cylinder 1,3,5,7,4,6,8 all read over 200 degrees at idle with number 2 reading 99 degrees. So looks like I'll be pulling it apart this evening to check wiring and possibly replacing the injector.