Thank you for the reply!

From everything I've read, it didn't seem like that sensor could cause those symptoms, though my original plan was to test it anyway. Just so happens that my meter is also my IR thermometer, so after measuring the coolant temp sensor, I went right to checking the manifold temps next to each injector. Based on what I found while doing that, it'd didn't feel necessary to check the other sensor. Do you believe it could be causing my problem and is therefore worth measuring, or does it seem that my tests pretty much point to the problem being with my #1 injector either being faulty or having an issue with it's wiring? Note that I'm leaving out the ECU as being a possible culprit, since I'm really hoping that won't be the case and am not sure how I'd even go about checking to see if it is!