How to determine if you have a bad Ecm. From testing CUMMINS ECM, CATERPILLAR ECM, DETROIT ECM,INTERNATIONAL ECM 1ENGINECONTROL has the right solution to diagnose a Bad or Good Ecm. Diesel Ecm Engine Diagnstics.   Before doing complicated things lets go back to the basics. Real technicians that are properly trained and cerfiied by Cummins […]