2011 lml. Deleted stock other then deletes. Driving down interstate on our way home from 2 HR drive truck keeps going into reduced engine power, no codes no rhyme or reason to it. Very intermittent. Shut truck off restart it and it's fine for a while again. When it happens throw it in neutral and rpms stay at 2k shut it off restart it and jumps back to 2k and hangs there. Only does it on trips. Doesn't do it during normal drive to work or anything which is 45 mins one way.
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