With cover off I tried pulling and pulling and jiggling on MAF and Throttle body. No change in vacuum (had in a big Torque Pro dial.

Did everything I could think of but nothing changed. Replaced engine cover and donut carefully. No change. Tomorrow going to change the oil ant take for a run.

Only outliers are the 9 and 12% long term trim but remember seeing short term go outta sight at stoplight last year. Probably what triggers the light.

Note the fuel trim increase is only at low idle, in crease to 1500 rpm and it drops back to normal.