It's an AEM UEGO unit. Gage acts like it's not getting power, I have it spliced into the large orange ignition wire coming from the fuse panel inside the car. I've never hooked up anything like this before so is this a bad choice for power? Also the sensor isn't screwed into the exhaust, I not sure if I'm going to keep it yet or not. I do want to make sure that it does work before I would sell it though. Thanks for any advise.