Curious if anyone with a2012 or 2013 Mack truck is having the same problem as I am. Been to the Mack dealer, hooked up to the computer and shows all is good, but the truck purges about every six minutes . They tell me that the air is to blow the fuel out of the line for the regen, but the air never stops flowing.  This makes the truck purge all the time, does not seem right that the compresser is running all the time. Anybody have any input?

sure you don't have an airleak somewhere? our 2013 mack doesn't purge that fast

I have did have a few air leaks which have been fixed.  When I unplug the atomization box at the 6 pin plug the truck will hold 125 until the next day.  Also when I was at the Mack dealer a 2012 showed up and his was going off every 5 minutes, three times in a row.  They say nothing's wrong, but it doesn't seem right to me.  How often does yours purge?

every 10-15 min