When I'm sitting on a hill or slight angle, Like a driveway. My AFR's will be settle around 14.7. But then randomly rich out hard core, and then lean out all the way to 18.0:1. The car will slowly dip in RPM's, If I give it gas the af'r bounce rich then bounce back to lean again. I have to hold it for a second then it will settle back into the 14.7 range, and then if I just sit and idle for a second it will lean back out and dip in RPM's.

I have no EGR/Evap/ or IACV. My car never use to do this. Just randomly started after header instal and tranny swap.

only codes I'm throwing are for the EGR/evap and IACV. and for the p0141 heater circuit cat converter 02, even though I have it simmed.

I had all my coils out while doing my swap so I know they were all in good condition. My plugs were changed not to long ago back when i did my 00vi swap, and they were in perfect looking condition.

I found a minor vac leak before the map/baro today and fixed it. But otherwise I have no idea what it could be.

My TC on the tranny is also sticking or getting locked into lower gears, could it be this? When I'm at idle?

The engine runs perfect, the car runs perfect when I'm driving it. but I have no idea why my afr's are bouncing like they are.