6.4 Powerstroke nightmare
I have a 2008 F250 with the 6.4 Powerstroke. I was having issues with it and was told I should probably reflash the tune. I wrote the original file read from the truck, and it seemed to work, except that the first time I went full throttle, it acted like a runaway diesel. With my foot totally off the accelerator, the truck flew up to over 5,000 RPM before I could shut the key off (luckily this stopped it). After letting it sit, I restarted, and it went back to running normal. I checked the throttle system and it is all working correctly, and the only code set was for engine speed overlimit. I have checked all the RPM limits and they are at 4,000. I can drive the truck all day with the throttle at idle to 3/4 with no problem, but as soon as I try going full throttle it turns into a runaway diesel again, belching out tons of black smoke, and the computer seems to have no control at all as it goes way past red line.
