I agree that at least the driver's side O2's are cooked for sure. Did you get the CAT's off the drivers side yet. I think any work you do from this point is useless unless you remove those CAT's. Your going to but new parts in and you will not get proper results if you have plugged, baked etc. CAT's on there.

 

No i have not got the cats off yet, I guess I was gonna try for the best and replace cop's, plugs, O2 sensors, I mean it does have 140k on it, and am pretty sure most of that is all original stuff. So it needs it anyway, Cant be much else causing this type of miss I would think.

 

Well I got the truck back to normal. I replaced cop's and plugs and she runs like a champ again.