It's been mentioned a few times and once I even saw a snippet of the Ford test procedure - the one that uses a full throttle application rather than the 65 mph steady speed. Can someone go through it for me? I just did a 1250 mile trip in two days towing 7500 lbs that had a lot of full throttle... I was interested to watch the delta's go up and down.

FWIW, after 10 - 15 seconds of 28 psi boost full throttle to crest a hill I would see 3 - 5 degrees difference - once I saw zero, ect and eot of 212 degrees. Cruise control uses way much throttle to go up hills when you are towing.

Thanks, brian.

 

TSB 09-8-3
http://www.phila.gov/fleet/Warranty%...sb09-08-03.pdf

Warm up truck, push the pedal down all the way a few times, the split should stay under 15* through all of this.