Danieltravelers Posted June 27, 2016 Share Posted June 27, 2016 I have a 2009 mack cxu613 with a MP7 with a DPF filter and no DEF fluid. when under load and when not under load it as excess black smoke from the tail pipe. I have already cleaned out the EGR valve and the pipes. I haven't cleaned out the DPF filter yet. its has 568983km but I have no codes. should I b looking into dropping the filter and getting it cleaned next or should b I looking some where else? Quote Link to comment https://www.bigmacktrucks.com/topic/45813-excess-black-smoke/ Share on other sites More sharing options...
Dirtymilkman Posted June 27, 2016 Share Posted June 27, 2016 Is there power or fuel mileage loss? Quote Link to comment https://www.bigmacktrucks.com/topic/45813-excess-black-smoke/#findComment-337676 Share on other sites More sharing options...
Danieltravelers Posted June 27, 2016 Author Share Posted June 27, 2016 nope. no power loss or fuel mileage Quote Link to comment https://www.bigmacktrucks.com/topic/45813-excess-black-smoke/#findComment-337683 Share on other sites More sharing options...
Danieltravelers Posted June 27, 2016 Author Share Posted June 27, 2016 I also have another one same kind of truck with the same situation except the engine light is on. the codes I have for this one is P102 - Boost pressure P105 - Boost temp P411 - EGR diff pressure P412 - EGR temp aftercooler PP270 - ( I cant find what this is) P096 - fuel level Quote Link to comment https://www.bigmacktrucks.com/topic/45813-excess-black-smoke/#findComment-337684 Share on other sites More sharing options...
fjh Posted June 27, 2016 Share Posted June 27, 2016 Look for a burst after cooler hose or cracked after cooler Quote Link to comment https://www.bigmacktrucks.com/topic/45813-excess-black-smoke/#findComment-337694 Share on other sites More sharing options...
Danieltravelers Posted June 28, 2016 Author Share Posted June 28, 2016 I checked the aftercooler and all the turbo hoses everything is good. no leaks found Quote Link to comment https://www.bigmacktrucks.com/topic/45813-excess-black-smoke/#findComment-337768 Share on other sites More sharing options...
steeler Posted June 29, 2016 Share Posted June 29, 2016 I made an aluminum plate to block off the egr pipe at the mixer. You could do that and run it to eliminate a leaking the valve. Quote Link to comment https://www.bigmacktrucks.com/topic/45813-excess-black-smoke/#findComment-337803 Share on other sites More sharing options...
Danieltravelers Posted June 29, 2016 Author Share Posted June 29, 2016 no my egr is working properly. I would rather fix it properly then doing a patch job on it. I know my filters will have to cleaned out for sure but does anyone think my injectors could b going bad? would I have a code for injectors if it was going bad or a cracked injector? my turbo has been changed already and my CAC and egr valve been changed twice. Quote Link to comment https://www.bigmacktrucks.com/topic/45813-excess-black-smoke/#findComment-337849 Share on other sites More sharing options...
steeler Posted June 29, 2016 Share Posted June 29, 2016 I wasn't suggesting a patch job, just a temporary test rig. Injectors will only set a code if something is wrong with the circuit, so it is possible you could have an injector problem without a code. Quote Link to comment https://www.bigmacktrucks.com/topic/45813-excess-black-smoke/#findComment-337851 Share on other sites More sharing options...
fjh Posted June 29, 2016 Share Posted June 29, 2016 (edited) DPF Restricting flo won't help the situation also the turbo could be stuck it will not throw a code for a stuck turbo either How ever you ve changed it so injectors seems possible! Clean the dpf see if it helps you got to do it anyway Your not going backwards! Edited June 29, 2016 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/45813-excess-black-smoke/#findComment-337874 Share on other sites More sharing options...
Danieltravelers Posted June 30, 2016 Author Share Posted June 30, 2016 @steeler oh ok. so even if there is no codes for the injectors they still could b a problem. got it. Quote Link to comment https://www.bigmacktrucks.com/topic/45813-excess-black-smoke/#findComment-337947 Share on other sites More sharing options...
Danieltravelers Posted June 30, 2016 Author Share Posted June 30, 2016 @fjh yea I had the dpf sent out to clean already and it failed. The dpf filter is no good. so will have to be looking at getting another dpf for this unit. But I will b having a look at the injectors just in case. but the dpf was part of the problem Quote Link to comment https://www.bigmacktrucks.com/topic/45813-excess-black-smoke/#findComment-337948 Share on other sites More sharing options...
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