Hunting down P0172, rich bank 1

[vettenuts]

I am running around 11.5 on my MAP at idle, which puts my vacuum at idle very good considering the car has a small cam in it. I am trying to sort out a P0172 error. Bank 1 seems to always be pulling a little more fuel than bank 2. I logged data tonight and unfortunately didn't get the cell number recorded, but there was no indication of anything erratic when the LTFT on bank 1 jumped to -14.1%, bank 2 was at -11.7%. This puts it over the threshold for seting a P0172. So I reset my recorded parameters and just ran the car without moving and found that I could get to -14.1% if I held the throttle just right and got the fuel to go to cell 1.

Is there any significance to this particular cell?

[vettenuts]

Update, I spent a lot of time plotting the data I recorded, and other than going to cell 1 there are no parameters out of line. The MAP didn't change, neither did the EVAP purge that is one of the components requiring further diagnostics according to the service manual. My only conclusions so far is either this particular cell and maybe others are out of line or my O2 may be FUBAR. I am going to swap out the O2 and see if that fixes it, if not further investigation into the fuel map may be necessary.