subiehoe 4eva

I have a 2000 legacy with 194k same issues only mine will do this when ever the he'll it feels like it.. Never a cel and some days it doesn't happen and others it's terrible.. I've run a scanner while the issue occurs and doesnt show anything out of the ordinary.. Been going on for about 8 months and have had 3 great mechanics get stumped.. Still no solution.. Thinking about just trading the car in. Would love to see if u figure out this monstrousity