I'm an idiot... I did the timing belt ~500 miles ago. Lexus called and said the Camshaft position sensor wiring harness had been damaged by the serpentine belt. I guess when I put it back I didn't route it correctly... so, my issue wasn't MAF or fuel pump related.
Sorry for the thread hi-jack but so glad it was my error and not a failure as I was beginning to wonder if I made the right choice on the 100
