Trying to figure out why the passenger side o2 sensor is reading different than the driver side. It seems to be causing the car to have a buck at low rpm (1500ish) around 25 mph to 30mph. I've tried everything I can think of to figure out why it's reading different. I've changed the o2 sensors, replaced to spark plugs, switched the injectors from one side to the other, did a leak down test on the engine, checked the headers for leaks, and checked the valve stem heights. So far nothing has changed the problem. Here's a scan to look at.
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