By Russ and Tiña De Maris If you’re stranded on the road, or afraid to leave home with a Cummins diesel-equipped rig, we have news. Last week we pointed out that Cummins didn’t make those diesel exhaust fluid monitoring (DEF) systems that have fouled up and even stranded so many RVers, but they could help … Continue reading Stranded due to DEF head? New developments and a possible workaround