Changed the spark plugs
Went to the shop today and the mechanic ran a test on this ignition system while driving down the road and found out that #4 and #5 cylinders were showing abnormal readings. So we ordered 2 more ignition coils and changed all 8 spark plugs without much headache. However, #5 plug did break and we extracted using the spark plug extracting tool from napa. I took it for a test drive and it seemed to do the trick to eliminate te overdrive problem.ill post the pics of the job. By the way, the mechanic did say that he changed plugs on several of these year model fords around 100,000 miles and #5 plug always seem to be the main one to go out!