OK, I drove the car over 350 miles, and the only code I still have is the P1540 - ABV Malfunction. I did see a pending P1173 (H02) at the 200 mile mark, but it disappeared and has not returned. To recap, so far I have replaced the ABV solenoids with new ones, replaced all vacuum lines, and ohm'd the fuel injectors. I hope someone has some other ideas of things I can check. Could it be something totally off-the-wall, like could it have something to do with the spark plugs I also replaced prior to this occurring? I would not think so but who knows? Any ideas would be appreciated.
Thanks.