Well it seems others are having problems with the 06-07 too. 7 pages on it here https://forum.ih8mud.com/threads/engine-shutting-off-during-long-trips.739113/
Haven't see a resolution yet.
Read the link above and it does not offer a lot of positive info for a fix
Although you did not get a CEL I'm hoping you show a DTC code once hooked up on TechStream
The posting senior lexus tech eyes were on the fuel pump - FWIW



Your killing me Phil. I'm still not sure why I was allowed to purchase another 4Runner last year but the wife has put here foot down on no more cruisers. Something about having way to many already. Guess I have a few to many.
Can't be any worse then the guy with the fund me account to finish his FJ55.
If you want I can give you my paypal and just fund me that way. That I at least know how to use.