I have a 84 Mustang GT 350 20th anniversary model with CFI and when I slow down to turn or stop, it sometimes dies. It starts right back up, but it does die. I have done a complete tune up and replaced everything that should fix it, but it persists to do this. Also, at highway speed I think I feel it "surging" sometimes. I think this is the only car that Ford put CFI on so it is hard to find anyone who knows anything about this set-up. Any suggestions?