Hey guys, I'm working on tuning my VVE on a new engine build and started getting a little rough idle. The whole story is kinda long, but basically I built a new engine, had a previous casting repair (before me, either previous owner or factory) that started leaking oil above the oil cooler a few days after getting it in and going. Got a new block, had it machined, and threw all my parts in the new block. I had it idling great before, and was doing good for a day or two, then I started doing a little exhaust work welding in v-bands and after putting my lead pipes back in I found this weirdness in my B1 O2 sensor. Anyone seen anything like this? Already checked plugs and wires, compression test is consistent across that bank, and verified no exhaust leaks. I am about to grab a new O2 sensor to swap in for kicks and giggles. Just thought I'd throw this up here in case anyone has seen an O2 sensor act up like this. I though they usually just go dead and read one direction. I'm wondering if in my engine swap, and taking the lead pipe out a couple times I've kinked a wire in the sensor or something. I was only gentle with my wideband, which is in the other side. I'll let you all know what I find.