Surging idle Mustang GT 4.6
Guys, I have a 2000 GT with the 4.6. I recently had a new engine dropped in it but ever since the dang thing won't run idle. It surges up and down, even if I let warm up. I was told that I had to drive it for about 100 miles before the computer would reset and everything would sync up. So far I've driven it for over 300 miles and it still surges. Anyone else run into this problem?