Have a 2013 CXU 613 with MP8 that won't regen. Code is for NOX levels too high. Truck is at the dealer and they told me the fuel valve for 7th injector was not shutting off and fuel was constantly being injected, so it was replaced without solving problem. Regen temps are reversed to what they should be and forced regen won't complete. I was told they made an inquiry with Mack and it was suggested that it may be that injectors are over fueling causing the problem. I was also told by dealer that they have no way to test injectors for this issue. Truck has 830 K kms and 14,500 for hours. Is there a way to do some more indepth diagnosis without just throwing parts at problem. I know there are some Mack technicians on here and if they would shed some light on this, I would be grateful. Thanks from UNDERdawg.
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UnderDawg
Have a 2013 CXU 613 with MP8 that won't regen. Code is for NOX levels too high. Truck is at the dealer and they told me the fuel valve for 7th injector was not shutting off and fuel was constantly being injected, so it was replaced without solving problem. Regen temps are reversed to what they should be and forced regen won't complete. I was told they made an inquiry with Mack and it was suggested that it may be that injectors are over fueling causing the problem. I was also told by dealer that they have no way to test injectors for this issue. Truck has 830 K kms and 14,500 for hours. Is there a way to do some more indepth diagnosis without just throwing parts at problem. I know there are some Mack technicians on here and if they would shed some light on this, I would be grateful. Thanks from UNDERdawg.
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