So today as I'm back out of my driveway my (automatic) Mustang seemed to stall. Before that happened my exhaust was puttering differently. I turned the ignition off then on and it seemed to be fine, afterward. Actually the other day it puttered weird also until I gave it some gas and then it was fine thereafter. Both times it was right in the morning when I first drove it for the day and never happened again in that day. Any ideas? The exhaust is like a week or two old. Could it have to do with the P0607 code I have?

 

This happened to my automatic as well, and I ended up replacing the TPS (Throttle positioning sensor) and that fixed the problem.