Today I drove about 25 miles to another city. I did just under 80mph all the way there. Once I got there and got off the highway my first turn my car stalled when I went to switch into second. My vafc2 says my cars idle drops to 400 something for a sec then back up into the high 600's. It only bogs down like that when I push the clutch in. Anyone have an idea of what this could be? Thanks.