Afr oscillating while cruising

[Haedenjames]

Remanufactured motor with 2k miles on it. Just started noticing this weird issue where it’s really jerky trying to take off and while cruising. my afrs are oscillating while this is happening. Any idea what this could be? car pulls hard and idles good just when I take off and cruise.

 

[Easter Bunny]

Check for leaks in the intake track could be crack that only opens up when the motor torques out of position

 

[Haedenjames]

Check for leaks in the intake track could be crack that only opens up when the motor torques out of position

Everything has been checked over. Does this look like a vvt issue? My tuner said the vvt is really low and to check it. Whatever that means

 

[Haedenjames]

Here’s an update. I replaced the primary 02 with an ntk 24354 (that’s all autozone had and said fit my car) the surging is fixed and no more crazy afr but now at wot I’m way lean like 13 afr car feels fine tho no kr. Is this the wrong sensor possibly?

 

[Mfinlay04]

That is the correct o2 sensor. Chances are you old sensor had shifted and was no longer reporting the correct AFR. I would attempt to retune using the new sensor and just watch for symptoms of kr or the car running lean/rich.