If you have 15 years experience you shouldn't need codes. . .
Has it been raining where you are, or did you water your interior lately.
Sounds like you have some ghosts and by the lack of communication with the Mrs. you should probably start checking around her. It is possible the the level indicator is dragging a little around the half or somewhere there abouts and it is also possible that the indicative signs here could be pointing towards issues in the fuel tank, persay bad fuel, failing pump, debris getting passed the filter. As for the gremlins, that is your vehicle telling you what is wrong.
With some more details and timeline I could probably help you find the direct problem/s.
White gauges and Temp Cntrl, OHCw/Buggman LED mod,
Bosch +4, Accel Coil Pack, MSD6AL, Walbro, HiFlo Fuel filter,
Custom Ram Air, K&N, Ported / Matched intake, JBA 9mm wires,
Tweeked FPR, EBC 6k's, DynoMax-S CatBack, Jet-Chip, Reflex shocks,
New Anvil Mounts, Timbren's, Optima Yellow, DB 220A Alt. w/4g. jumper,
Western snow plow, More2Come