2003 6.0 Surging with cruise control only.
Alright fellas, i have looked everywhere and seen a few posts about this but nothing concrete as to why it happens. The truck is a 2003 F-250 with a 6.0 powerstroke, when i set the cruise at a speed over 65mph the truck surges/shutters terribly. On flat ground it does it, uphill or pulling a load its more noticeable but it does it under any condition to some degree. Had a friend hook up a scan tool and got nothing back from any sensor, they only thing of interest we got was the engine load percentage would fluctuate between 25%-60% every time the truck surged. Wondering if any of you have had a similar issue or have seen anything like it.