mackcat12 Posted January 14, 2018 Share Posted January 14, 2018 I have a 2018 Mack granite with the mp7 425M engine and Mdrive HD transmission and I’m having problems with low power it all started after a parked regen truck doesn’t have the power it had before the regen, the turbo just dies when you hit a hill,whistle is real faint went to the dealer and they hooked up the laptop no codes at all everything checked out boost was around 35 but the engine isn’t getting the boost fuel mileage is terrible and pyro temp is up by about 200 degrees. Truck has 9,000 miles on it dealer doesn’t know what to do so they called Mack and they don’t know what it could be either. Does anyone have any ideal what could be wrong? Any info would be greatly appreciated. Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/ Share on other sites More sharing options...
41180 Posted January 14, 2018 Share Posted January 14, 2018 Parked regen ? I wouldnt think your truck would do a parked regen unless something was wrong and it was at a dealer. My 2015 has never done a parked regens while working and it has 200k miles Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-389647 Share on other sites More sharing options...
mackcat12 Posted January 14, 2018 Author Share Posted January 14, 2018 I haul asphalt and idle a lot and most of the trips are short hauls so it could not do a regen on the go Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-389649 Share on other sites More sharing options...
OJ Avery Posted January 16, 2018 Share Posted January 16, 2018 sounds like a charge air leak, did the dealer smoke test it? It should be pushing 39-42 psi Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-389794 Share on other sites More sharing options...
j_martell Posted January 16, 2018 Share Posted January 16, 2018 In the 5 years I drove the 2011 Granite (405M MP7), I was prompted to do a Parked Regen 3 times. After each of these times (within a few weeks, anyway), some other SCR component would fail, and land me in the shop......DEF doser's come to mind.... Its a roll off, so similar usage i suppose.....not many miles, but lots of hrs.... Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-389813 Share on other sites More sharing options...
mackcat12 Posted January 17, 2018 Author Share Posted January 17, 2018 They didn’t do a smoke test every thing they have done has been with the computer. I’m waiting on Mack now the are doing remote diagnostics to see if the dealer missed anything. Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-389827 Share on other sites More sharing options...
mackcat12 Posted February 8, 2018 Author Share Posted February 8, 2018 Update, after 2 weeks of my truck sitting in the shop at the dealer Mack decided that the dpf filter is bad so they finally got the new filter in this morning and are in the process of getting it all back together and testing it out. I hope this is the fix, this down time is killing me I will post another update when I find out something. Fingers crossed Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-391482 Share on other sites More sharing options...
fjh Posted February 8, 2018 Share Posted February 8, 2018 So much for The MACK commitment to service and Uptime! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-391483 Share on other sites More sharing options...
mackcat12 Posted February 8, 2018 Author Share Posted February 8, 2018 You said a mouthful there!! I just came from the dealer they wanted me to test drive it to see if that fixed the problem took a mechanic with me we went to the rock quarry and got a load of stone problem is still there when you start into a hill turbo just goes away highest boost i saw was 37 so back to the shop again!! I guess it’s working just good enough not to throw any codes but not working right if that makes any sense, so I guess they will check the turbo and the mechanic said something about reprogramming the ecm so we play the waiting game again! Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-391500 Share on other sites More sharing options...
fjh Posted February 9, 2018 Share Posted February 9, 2018 (edited) Chances are they will have to file an e service The follow instruction from Big brother!!! And depending on big brothers experience , he may or may not roll the dice correctly Could possibly be a turbo issue won't throw a code for that. could be a stuck egr valve may or may not throw a code for that!There are several good guys at Eservice And there are a few ledgends in there own minds guys that may stone wall them Unfortunately, hopefully they get one of the good ones and minimize your down time! It all depends on who has the balls to throw the right part at it with info provided! chances are its a stuck turbo issue as it is a fairly common thing! Good luck to ya! Edited February 9, 2018 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-391554 Share on other sites More sharing options...
mackcat12 Posted February 9, 2018 Author Share Posted February 9, 2018 Thanks fjh yes they have been working with e service and I think they have finally figured it out they called me this morning and said the turbo failed calibration so Mack said to put a new turbo on it. I told them from day one the turbo wasn’t working right so hopefully this will fix it, they have the turbo ordered so it will be next week before I know anything Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-391557 Share on other sites More sharing options...
fjh Posted February 9, 2018 Share Posted February 9, 2018 Thats all well and good as long as you can still work thats the key! UPTIME if you can suffer thru with a little less power until the turbo gets here then great turbos are not cheap to stock and depending on how many failures they have in their area it may not be worth it to have one on the shelf ilies why they order one! Again good luck just remember EVERYBODY else is having the same and or similar issues with this new stuff Mack and volvo don't have the market cornered when it comes to turbo failures! Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-391559 Share on other sites More sharing options...
mackcat12 Posted February 27, 2018 Author Share Posted February 27, 2018 Update dealer installed new turbo and I picked up the truck got a load on it and it is basically the same as it was before, when you start into a hard pull the turbo sound gets real faint and the truck starts lugging and vibrating so bad that every thing on the truck rattles,fuel mileage did increase after the new turbo before New turbo it was 3.8 mpg after 5.4 when it was running like it’s suppose to I was getting 7.4 mpg. Called dealer he said he doesn’t know what else to do so he is going to have his district manager to come by and ride with me and we will go from there, this is getting very frustrating truck has 10,150 miles on it now and should not be having these problems!! Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-392972 Share on other sites More sharing options...
Dirtymilkman Posted February 27, 2018 Share Posted February 27, 2018 If it's vibrating that sounds like injection cups. Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-392981 Share on other sites More sharing options...
ksrolloff Posted February 27, 2018 Share Posted February 27, 2018 I have a 2018 Mack MRU, 14000 miles . its been to dealer 10-12 times... e-service is involved, bottom line Mack and their people don't care, (not the dealer) Mack Corporate is a mess. There is no customer service, todays Mack, is not of yesterday,,,,,, very sad 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-392998 Share on other sites More sharing options...
Maxidyne Posted February 27, 2018 Share Posted February 27, 2018 The amazing thing is that they've had 8 years to adapt to the 2010 emmission regs and they're still having problems... 2 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-393007 Share on other sites More sharing options...
fjh Posted February 27, 2018 Share Posted February 27, 2018 (edited) 11 hours ago, Dirtymilkman said: If it's vibrating that sounds like injection cups. Agree however if you get the wrong eservice guy this can drag things out. you got to follow their protocol or you don't get paid! Its a rock and a hard place for the dealer! Having said that. it is a 2018 likley common Rail and haven't estabished a track record for failure s yet! Edited February 27, 2018 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-393013 Share on other sites More sharing options...
mackcat12 Posted February 27, 2018 Author Share Posted February 27, 2018 It is very sad I sold my 1988 rd Mack to buy this granite the 88 never let me down I should have kept it,so far my 2018 has been back to the dealer more times than my old 88 ever was in the 30 years I owned it! I bought a new truck so I wouldn’t have any Down time, so much for that!! 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-393014 Share on other sites More sharing options...
Rockwell Posted February 28, 2018 Share Posted February 28, 2018 So horribly sad what has become of tough American Bulldog. I feel your pain and wish you swift resolution. Down time kills. Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-393046 Share on other sites More sharing options...
Hayseed Posted February 28, 2018 Share Posted February 28, 2018 Just out of Curiousity , Does Mack have this Program In North America?? https://www.macktrucks.com.au/parts-and-services/ultimate-uptime/?utm_medium=Social&utm_source=Programatic&utm_campaign=Mack&utm_content=UpTimeRetargeting&utm_term=SLA Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-393078 Share on other sites More sharing options...
Popular Post Dirtymilkman Posted February 28, 2018 Popular Post Share Posted February 28, 2018 4 hours ago, Hayseed said: Just out of Curiousity , Does Mack have this Program In North America?? https://www.macktrucks.com.au/parts-and-services/ultimate-uptime/?utm_medium=Social&utm_source=Programatic&utm_campaign=Mack&utm_content=UpTimeRetargeting&utm_term=SLA Hahahaha hahahaha hahahaha hahahaha........ hahahaha hahahaha 2 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-393079 Share on other sites More sharing options...
Popular Post Hayseed Posted February 28, 2018 Popular Post Share Posted February 28, 2018 I'll take that as a NO. 3 Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-393082 Share on other sites More sharing options...
macks in nigeria Posted February 28, 2018 Share Posted February 28, 2018 5 hours ago, Hayseed said: Just out of Curiousity , Does Mack have this Program In North America?? https://www.macktrucks.com.au/parts-and-services/ultimate-uptime/?utm_medium=Social&utm_source=Programatic&utm_campaign=Mack&utm_content=UpTimeRetargeting&utm_term=SLA I don't imagine so from the complaints we read here. Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-393083 Share on other sites More sharing options...
Mackpro Posted February 28, 2018 Share Posted February 28, 2018 23 hours ago, fjh said: Agree however if you get the wrong eservice guy this can drag things out. you got to follow their protocol or you don't get paid! Its a rock and a hard place for the dealer! Having said that. it is a 2018 likley common Rail and haven't estabished a track record for failure s yet! We have 10 or 12 common rail engines running around here for over a year and still have not had any problems that a software update couldnt cure. So far so good! Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-393090 Share on other sites More sharing options...
fjh Posted February 28, 2018 Share Posted February 28, 2018 (edited) 1 hour ago, Mackpro said: We have 10 or 12 common rail engines running around here for over a year and still have not had any problems that a software update couldnt cure. So far so good! We also have half a dozen running around here And the same result ! To my surprise few issues in the fuel system department, we changed a couple of rail sensors so far that,s it That s in keeping with the on going cheapass sensor thing that has always been a thorn! (May) have a winner : we will see! As for up time ! ?? They talk the talk ,but its the walking they have trouble with! They tend to stumble alot! Edited February 28, 2018 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/#findComment-393093 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.