X15 2250SN fault code 1911

[Kenworth509]

On quickserve cummins only give a maximum spec of 200ml of 60 seconds for injector return measured from the return block.
This test is carried out with insite using the high pressure fuel leakage test and then you take the measurement. I’ve always had a constant injector return flow from previous jobs.
But this engine is returning only 30-40ml of the 60 second time period witch has me thinking it isn’t enough.
I’m installing a new X15 this week coming into another truck so once it’s installed I will do some return testing on that and compare.

When you drive this truck with the faulting fuel system and it becomes active you loose the pedal as described in quickserve because the ecm has put the fue actuator in reset, and you watch the fuel rail pressure disappear as the relief valve is working correctly. You then shut the engine off and you can hear the relief manually reset.