Checking Out an Intermittent Engine Exhaust Leak One of the 2009 Cummins ISB diesel engines we have in our fleet was experiencing an exhaust leak intermittently. The driver reported that when he was coming to a stop with the exhaust brake on he would be overtaken by exhaust fumes. Originally I went with him on… Continue reading Cummins ISB Diesel Engine Regen Using Insite Lite Software