Ops sorry - did you check the clutch switch?
Some ECM are configured where jakes will only operating above a certain MPH (above 3mph etc.) did you drive the truck and test jake?
Can ISMe be upgrade to higher HP then the 411HP. The US ISM can go to higher HP. I tried a US ISM ecm on a ISMe engine and truck would surge on...
Truck cut power anytime especially when climbing hill and you have to stop and start again to regain any power. It seems to happen less when...