ecofleet Posted November 30, 2022 Share Posted November 30, 2022 We have had major issues with a 2008 MP8 in a CXV. Have replaced the complete dpf muffler assembly once, now has failed again. Engine temp warnings, etc... filter is clean, etc... Truck has had a surging problem / lack of throttle issue for months as if the turbo or vgt was not right, but no error code. QUESTION - can a failed turbo cause the DPF muffler to fail due to excess heat / fuel/etc??? We have replaced the sensors for the delta P and boost pressure, no change. Quote Link to comment https://www.bigmacktrucks.com/topic/70786-dpf-turbo-failure-mp8-2008/ Share on other sites More sharing options...
fjh Posted November 30, 2022 Share Posted November 30, 2022 1 hour ago, ecofleet said: We have had major issues with a 2008 MP8 in a CXV. Have replaced the complete dpf muffler assembly once, now has failed again. Engine temp warnings, etc... filter is clean, etc... Truck has had a surging problem / lack of throttle issue for months as if the turbo or vgt was not right, but no error code. QUESTION - can a failed turbo cause the DPF muffler to fail due to excess heat / fuel/etc??? We have replaced the sensors for the delta P and boost pressure, no change. Yes ! Turbo replacement aint cheap! check first! I am no guru on this however ! do you have ptt? Check the fuel pressure first and Check 7th injector spray and EGR Flow! ! The injector spray is important too! Turbo lack of a air creates soot! Soot plugs the grid ! Not enough boost can't create the heat needed to burn the soot! Viscous circle! Check and clean also Diff pressure sensor on the venturie tube the egr flow can create more soot that can clog the turbo sleeve causing it not to stroke properly! another viscous circle! Start at the front work to the back if your in doubt! the engine will surge with either or condition From what I have witnessed! If you don't check /repair the shit in front of the turbo and replace the turbo you will be back at it in short order! Just sayin! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/70786-dpf-turbo-failure-mp8-2008/#findComment-516483 Share on other sites More sharing options...
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