Small air leak behind the dash, we found the leak was at the air gauge assembly I replaced the air dryer filter and the governor itself a while ago Most of these are serviceable depending.
Freightliner M2 air leak behind the dash. Easy DIY repair you can do
Freightliner m2 2017 air leak and smoke on acceleration issue m2 models often face turbo boost leaks and egr valve malfunctions causing smoke and air leaks
Air leaks during acceleration often stem from cracked intercooler hoses or loose clamps in the intake system
Inspect all vacuum lines and turbocharger connections for damage or disconnections. 2005 freightliner ext cab m2 mountain master rv puller, cat c7 300 hp, 6 speed allison trv3000, air locker 4.33 diff, michelin 255/80r22.5 lrg tires, pulling a 2008 40' triple axle hitchhiker. The freightliner m2 is one of the most widely used medium duty trucks in north america From delivery fleets and municipal trucks to ambulances and vocational work trucks, the m2 is everywhere
With that workload comes one reality If you own or maintain an m2, staying ahead of dpf clogging, scr poisoning, high soot output, clogged egr coolers, and fouled injectors is. I have a 2011 freightliner m2 business class Truck builds air fine, but when you apply throttle when driving the air will leak down about 10psi, it sounds similar to the spitter valve but continuous, then the compressor kicks on and builds air pressure back up to normal (you can hear the air leak from the cab & see pressure drop on both air gauges)
The weird part is that the air leak only.
One of the air lines is leaking right at the dash air gauge where the plastic line goes into the plastic bezel for the gauge I have no idea how that line terminates or if a special fitting is on the end, so i don't want to attempt to drag it out before i know the proper fix I have an m2 freightliner, and the air governor is continuously leaking air from the exhaust port
