i had this problem i changed my spark plugs and i was good

 

My tuner says it won't be the CAS or coil packs (the car wouldn't run or would show a code for two cylinders instead of all). I replaced the plugs and wires and still got it. I think it's the Toyo RA-1s I've never run before and driveline harmonics. I used Ecuflash to disable the code altogether after getting it all the way to VIR and back but NOT ONCE on track.

The sensation when the code is thrown is not missing; it is fuel cut. My wideband went to 18:1 and then full lean during the episodes, but zero knock and no other codes.

If the car runs fine under boost and all other situations except cruising, disable the code. Don't waste money on parts.