striker Posted January 29, 2010 Share Posted January 29, 2010 '09 Pinnacle, MP8 Mack engine, 126K miles starting to have several DPF issues. Truck is in the shop for the 2nd time in 2 weeks with plugged DPF. Elec. malfunciton lights, VIP readout warnings, no regen symbol lights on the dash and the blue switch isn't lighting up. Truck won't re-gen, but it's also not derating itself or doing things it's supposed to do, dealer hopes to get it fixed correctly this time, they have had it since 2pm today and said it will be done by Sat. afternoon. Wondering if anyone else is having these issues also. Quote Link to comment https://www.bigmacktrucks.com/topic/12433-dpf-issues/ Share on other sites More sharing options...
Mackpro Posted January 31, 2010 Share Posted January 31, 2010 '09 Pinnacle, MP8 Mack engine, 126K miles starting to have several DPF issues. Truck is in the shop for the 2nd time in 2 weeks with plugged DPF. Elec. malfunciton lights, VIP readout warnings, no regen symbol lights on the dash and the blue switch isn't lighting up. Truck won't re-gen, but it's also not derating itself or doing things it's supposed to do, dealer hopes to get it fixed correctly this time, they have had it since 2pm today and said it will be done by Sat. afternoon. Wondering if anyone else is having these issues also.Foe the most part the DPF's on the CHU/CXU and GU's have few problems. Sometimes on the 08 and early 09 versions that dont have the air purge/self cleaning 7th injector tou have to clean the soot off the 7th injector once or twice a year. The newer 09 and up have fewer problems. Engine issues cause most DPF problems, Bad turbo's, stuck EGR valve, over fueling/cracked injector can flood the DPF with soot or lack of air to burn out the soot. It can be a real pain to figure out. It's not a every day thing but it does happen. We have see this enough now to kinda know what to look for. Good luck and I hope they get it fixed soon. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/12433-dpf-issues/#findComment-48752 Share on other sites More sharing options...
striker Posted February 3, 2010 Author Share Posted February 3, 2010 Foe the most part the DPF's on the CHU/CXU and GU's have few problems. Sometimes on the 08 and early 09 versions that dont have the air purge/self cleaning 7th injector tou have to clean the soot off the 7th injector once or twice a year. The newer 09 and up have fewer problems. Engine issues cause most DPF problems, Bad turbo's, stuck EGR valve, over fueling/cracked injector can flood the DPF with soot or lack of air to burn out the soot. It can be a real pain to figure out. It's not a every day thing but it does happen. We have see this enough now to kinda know what to look for. Good luck and I hope they get it fixed soon.dropped the truck off on 1/28 about 2pm, they finally got it fixed on 2/2 in the am. Took them 4 days (not counting Sunday that they were off) to determine it was a blown fuse for the blue manual regen button. One simple blown fuse caused massive problems, even had the local engineers Mack Corp. engineers stumped. One of the techs randomly on Monday night was checking fuses and caught it, they replaced it this morning and now it works fine (crosses fingers). The did a forced regen on it to clean it out, and are leaving me an extra fuse and location of that fuse incase it happens again. Quote Link to comment https://www.bigmacktrucks.com/topic/12433-dpf-issues/#findComment-48890 Share on other sites More sharing options...
Mackpro Posted February 3, 2010 Share Posted February 3, 2010 dropped the truck off on 1/28 about 2pm, they finally got it fixed on 2/2 in the am. Took them 4 days (not counting Sunday that they were off) to determine it was a blown fuse for the blue manual regen button. One simple blown fuse caused massive problems, even had the local engineers Mack Corp. engineers stumped. One of the techs randomly on Monday night was checking fuses and caught it, they replaced it this morning and now it works fine (crosses fingers). The did a forced regen on it to clean it out, and are leaving me an extra fuse and location of that fuse incase it happens again.Dont feel bad we had a MRU brought into the shop on 1/6/10 and we finally got it fixed and out on 1/29/10. It had bad DPF problems, we dont know what we did to fix it other than throw lots of parts at it, but we go it done. The MRU and LEU (mostly garbage trucks) have a totally different DPF system on them due to low exhaust temp because of stop and go driving. Quote Link to comment https://www.bigmacktrucks.com/topic/12433-dpf-issues/#findComment-48907 Share on other sites More sharing options...
mp8_macky Posted January 5, 2016 Share Posted January 5, 2016 deleting the trucks saved my ass, and since it was super hard to find someone to do it, that's why i decided to post it here on forum, to help others.my trucks are idling 80% of the time (running pto), and my dpf was clogging all the time.solution: http://truckecmtunes.com/ Quote Link to comment https://www.bigmacktrucks.com/topic/12433-dpf-issues/#findComment-318715 Share on other sites More sharing options...
j hancock Posted January 5, 2016 Share Posted January 5, 2016 What type of work are you doing with 80% pto time? Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/12433-dpf-issues/#findComment-318717 Share on other sites More sharing options...
mp8_macky Posted January 5, 2016 Share Posted January 5, 2016 oil fields Quote Link to comment https://www.bigmacktrucks.com/topic/12433-dpf-issues/#findComment-318719 Share on other sites More sharing options...
Lyfsfun Posted May 7, 2016 Share Posted May 7, 2016 (edited) mp8_macky: Where are you, I am in ND? Work from the MT/ND border, (Williston) to Minot area. I just bought a 2012 CXU613, when you have time holler at me. I would like to know what you have spotted I should look out for. You heard anything about a oil sensor that somehow leaks oil into the harness and it can end up in the computer? Have you cut any of your oil filters open to look for metal? That's the two I know to watch for so far. Thanks for posting the link. ed@maillte.com Edited May 7, 2016 by Lyfsfun Quote Link to comment https://www.bigmacktrucks.com/topic/12433-dpf-issues/#findComment-332553 Share on other sites More sharing options...
Keffer inc Posted July 7, 2016 Share Posted July 7, 2016 How often do you need to clean the DPF? Both by regen and servicing by cleaning it off the truck? speaking about the 2007-2010 trucks? Quote Link to comment https://www.bigmacktrucks.com/topic/12433-dpf-issues/#findComment-338728 Share on other sites More sharing options...
aw12345 Posted July 11, 2016 Share Posted July 11, 2016 Pretty sure Mack specifies 350.000 miles for a dpf cleaning Quote Link to comment https://www.bigmacktrucks.com/topic/12433-dpf-issues/#findComment-338984 Share on other sites More sharing options...
Roger Naeger Posted September 2, 2019 Share Posted September 2, 2019 What does the temperature system lockout mean? Check engine light is on and this is it says to check. Quote Link to comment https://www.bigmacktrucks.com/topic/12433-dpf-issues/#findComment-431301 Share on other sites More sharing options...
mp8_macky Posted February 3, 2020 Share Posted February 3, 2020 Dang I just saw this. I am not very often on forums sorry. I get here from time to time, and inform people about all issues I had and sovled them. Any how Quote You heard anything about a oil sensor that somehow leaks oil into the harness and it can end up in the computer? Have you cut any of your oil filters open to look for metal? I had a problem with oil leaking into ECM and shorting it. So do the preventive checks. I didnt cut any filters to look for metal but you can do that, if you find metal - you are toast (engine rebuild is about to happen). Quote Link to comment https://www.bigmacktrucks.com/topic/12433-dpf-issues/#findComment-441859 Share on other sites More sharing options...
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