This is so crazy. This sounds exactly what happened to me this weekend. ( Not to highjack the thread)
I was heading up from Morro Bay Sunday morning when my 06 Daybreak just stopped running.I got towed to a shop in Watsonville. It would start then die.
They tested fuel pressure and spark, all normal. They got abnormal trim codes and inspection revealed bad info from the Mass Air Flow sensor.
Are you ready for this. The found a bug lodged in the MAF Blocking air flow to the sensor filament. Cleaned it out, put in new filter and it runs perfect.