6.7 cummins rough idle at my whits end
#1
6.7 cummins rough idle at my whits end
ive searched and searched on google and cannot find the answer. my truck is a 2007.5 deleted s&b intake, h&s xrt pro tuner and 4inch exhaust. no matter if its warm or cold out truck has rough idle and white smoke on start ups. then once it has reached operatong temp it clears up and randomly not every day it has a lil pop sometimes it doesnt do it at all. I had our shop diesel tech scan it and do injector kill test it passed everything what am i missing here?! any help would be appreciated.
#3