Well, it was a "no go". Changed out the FPR, MAF, and EGR, reset the codes last night. Drove it around all day running my errands and catching up with some friends. Ran wonderful. Really felt like she was breathing better. Upon jumping in to leave to come home this evening, she sputtered on startup and stalled a couple times in park. Next thing ya know, "CEL". Same issues as before the parts swap. 171 and 174 remain.

I got her home and let her sit running at idle in the driveway while I tinkered around a bit more. I found that when i wiggled some wiring, the idle RPM would dance around some. I may want to look at some of the rewiring I had to do when I extended lines for the S/C install. Something may have come undone over time or something.

I may just go ahead and add the o2 sensors to my TO DO list next.

I am seriously losing patience (and wallet fat) with VX maintenance.