robnels218

My 05 mack with a e7 shutdown while driving, towed it back to shop had fault codes for all eup, checked wires from each pump to ecm connector all where good. hung a test ecm on truck it started got a new ecm from mack put it on truck started and ran for two days then shut down again with the same codes hung test ecm truck started before I get another ecm im at a loss what I should be checking for don't want to fry another ecm any advice would be appreciated