2001 Plymouth Voyager 2001 Plymouth Voyager fuel injector..

I checked my 2001 Plymouth Voyager 3.3 L on the scanner the other day because of the miss in the engine. It says fuel injector cylinder 1. Then the next day, I checked it again. It says fuel injector cylinder 6. I checked the injectors on both cylinders. First, on cylinder 1, there is an open circuit. And on cylinder 6, it's closed. After 15 minutes later, I start the car again. I check both cylinders. On cylinder 6, it's open. And on cylinder 1, it's closed. I have no idea why it's acting up that way. If anybody has an idea, I would appreciate a response. My first post btw..... Thank you!