Hello I am new here to Powerstroke nation. I have an early 2004 f350 6.0 its 4x4. The truck idles at 500 rpm it only shuts off after i have been driving above 65 mph for 10-15 min or more then as i start to hit the break and get to a lower speed is when it shuts off. i just put a new turbo, intake manifold, icp sensor, and egr delete in it. I am completely lost as to why this is happening it does not leave a code and the mechanic said that my IPR is good. Any help would be appreciated.