^ I have the same problem. It happens maybe twice a year... cruising at highway speed then bleeeeah the more gas you give it the lower the rpm's want to go then BAM right back to normal again.

Then I have also experienced the quick shutoff and that has happened around 10mph as well. Maybe these are both problems with the fuel pressure regulator? I don't know.... this is wierd, as it doesn't happen with any kind of.... ruglartivity *my new word*. Everytime I just pulled off to the side in neutral and started it right back up, no codes or anything just right back to normal again.

I figured it had to be some kind of electronic thing that got wet or frayed from offroading , but now I think I may be more convinced about the fuel regulator.

Just posting up to say your not the only ones