So I'm running 65, sounds like a sewing machine, smooth as a baby's butt... come to a stop sign. Rpms drop to about 300 and she dies.
starts back up fine. Runs perfect after you start moving.
This happens about 4 more time, then seems to fix itself and doing fine again. ????

 

Check your idle screw on the throttle body. Mine adjusted itself after a long highway run due to a dry oring. Changed the oring and all fine again.

 

Will do thanks