I got a 00 powerstroke it somtimes dont run right when i have it on stock mode only i have a 5 pos dp
tuner . I have drove the truck on stock mode and it runs fine but once and a while it will start chugging/missing at around 1200-1400 rpm. and blows white out the pipe while chugging. it dont always miss. And latly it is been bad on gas. Have stage 2 injectiors in the truck they have been built early this summer. If anyone can help that would be great.