fjh Posted March 17, 2018 Share Posted March 17, 2018 Well at least they wont be in the same spot as the above post for a bit! only one thing to go wrong! I for one will be curious how the above post will plays out the symptoms are similar to the repair we did to an older truck last week which turned out to be a cracked DPF can ! in this case they would likely have to replace the whole thing as its been sort of unitized! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-394332 Share on other sites More sharing options...
Mack Technician Posted March 17, 2018 Share Posted March 17, 2018 We just spent a bunch of time on a DOC that was heating under spec but high enough to sorta perform. Issue was coolant leaving EGR cooler via leakage. Coolant ash is a killer. $18k worth of final damages. Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-394335 Share on other sites More sharing options...
mackcat12 Posted March 17, 2018 Author Share Posted March 17, 2018 A cracked dpf can would make sense since all my problems started after a parked regen. Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-394357 Share on other sites More sharing options...
fjh Posted March 17, 2018 Share Posted March 17, 2018 Be sure to post the ending to this story Bud! Sad to see your having this issue to start with but will be a relief for everyone ! when its fixed! All ya can do is keep on em about it! Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-394377 Share on other sites More sharing options...
mackcat12 Posted March 17, 2018 Author Share Posted March 17, 2018 I will definitely let you guys know how it turns out so if anyone else has this problem it might help them. Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-394380 Share on other sites More sharing options...
fjh Posted March 31, 2018 Share Posted March 31, 2018 Well yet another open ended story Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-395514 Share on other sites More sharing options...
mackcat12 Posted March 31, 2018 Author Share Posted March 31, 2018 Fjh I’m still waiting on Mack to figure out what’s wrong with my truck I am so aggravated it’s not funny, I guess I am going to have to contact someone higher up to see what my options are I’m ready for Mack to replace this truck been dealing with this since December I believe I have a lemon 🍋 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-395549 Share on other sites More sharing options...
fjh Posted March 31, 2018 Share Posted March 31, 2018 Good your still checkin in ! But not good! GOD This is ridiculous Maybe they will tweak the programing and do a download on your truck Hopefully ! Is anybody saying anything? Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-395554 Share on other sites More sharing options...
mackcat12 Posted March 31, 2018 Author Share Posted March 31, 2018 They said there is a update but Mack told them not to do it until they analyze all the data, I have had to go over there 2 times for them to ride along with the laptop hooked up to record data the last time they said the file was too big and wouldn’t send to Mack they had the truck a day and a half this week to check everything I went to pick it up yesterday and as soon as I pulled out of the lot the engine light came on I called guard dog connect and they said a code p1140 showed up for compression brake I will have to go back Monday and have that checked. We are waiting on Mack to analyze everything and will go from there again!!! Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-395560 Share on other sites More sharing options...
fjh Posted April 1, 2018 Share Posted April 1, 2018 It Won't be the first time there has been programing issues with this stuff! They run within quite tight perimeters. We did a power upgrade on a truck last year and now the engine brake is weak on the truck we are still chasing this! We did yet another power upgrade on another truck and the truck wouldn't start afterwards they installed the wrong data file at their end ! The customer WAS livid ! Customer had the truck booked for the next day.Of coarse this happened at the end of the day and you can get a hold of anybody in Mack land to get the issue resolved! NOTE TO SELF don't reprogam at the end of the day it may backfire on you, 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-395636 Share on other sites More sharing options...
mackcat12 Posted April 1, 2018 Author Share Posted April 1, 2018 They keep telling me they think it’s software related who knows they have told me so much I don’t know what to think Friday they told me there was a code for clutch slippage and said if the clutch is slipping in the mdrive that it would disengage the turbo so I guess now I have transmission problems too . If they don’t soon get this thing figured out I’m going to talk to someone at Mack about replacing this truck, I have lost so much money with all the down time and I have to use the truck with it not running right and that can’t be good for it I feel like that is creating more problems but I don’t have a choice I have to run it while I can in between the dealership visits,they have it more than I do!! The dsm never did show up seems like nobody at Mack is too concerned about my truck the service manager said there is 2 other trucks out there with the Same problem as mine Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-395655 Share on other sites More sharing options...
Lmackattack Posted April 2, 2018 Share Posted April 2, 2018 How many miles are on this truck? Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-395693 Share on other sites More sharing options...
mackcat12 Posted April 2, 2018 Author Share Posted April 2, 2018 It’s got 12,000 miles on it now my problems started around 7,200 miles Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-395709 Share on other sites More sharing options...
mackcat12 Posted April 2, 2018 Author Share Posted April 2, 2018 I got the dsm’s number and called him today he said he will be here Thursday and is going to bring a engineer with him to figure this thing out so we will see if he shows up this time! Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-395755 Share on other sites More sharing options...
fjh Posted April 3, 2018 Share Posted April 3, 2018 Hurry up And Wait! Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-395810 Share on other sites More sharing options...
mackcat12 Posted April 6, 2018 Author Share Posted April 6, 2018 Guess who didn’t show up🤬🤬🤬 I’m ready to drive this truck through the front door of Mack Trucks in Greensboro!!! Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-396000 Share on other sites More sharing options...
Lmackattack Posted April 6, 2018 Share Posted April 6, 2018 Time to call HQ and explain this situation . This is absolute BS and I wonder if the dealer is trying to sweep this under the rug somehow. Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-396002 Share on other sites More sharing options...
fjh Posted April 6, 2018 Share Posted April 6, 2018 Maybe he couldn't find a willing engineer! Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-396026 Share on other sites More sharing options...
mackcat12 Posted April 6, 2018 Author Share Posted April 6, 2018 He finally called me today wants to set up a meeting for next Wednesday the service manager called me this morning and said e-service analyzed all the data from my truck and according to that it was running good.yeah right! Now they want to take it somewhere to put it on a dyno. I guess we will wait and see if the dsm shows up with that engineer before it goes to the dyno 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-396035 Share on other sites More sharing options...
mackcat12 Posted April 12, 2018 Author Share Posted April 12, 2018 The dsm showed up today and i had a good discussion with him,he seemed to really know the truck he went over it and found soot on the clamp that holds the dpf filter in told them to order a new gasket for it and he wants them to remove the valve cover and check valve adjustment and do all the software updates and check T1 temps because pyro temperatures are too high and then I will take it Monday morning to be put on the dyno and we will go from there. Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-396426 Share on other sites More sharing options...
fjh Posted April 12, 2018 Share Posted April 12, 2018 FINALLY! 3 months that is awesome response time ! Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-396464 Share on other sites More sharing options...
mackcat12 Posted April 13, 2018 Author Share Posted April 13, 2018 Ain’t that the truth!!! They suppose to start on it tomorrow I was driving it today and the power was so low it wouldn’t hardly get out of its own way and the new turbo is making a squealing sound now. Yesterday my fuel mileage was right at 8 miles per gallon I ran the same route today and it was 5.8 mpg and still no codes🤔 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-396505 Share on other sites More sharing options...
fjh Posted April 17, 2018 Share Posted April 17, 2018 Well its another week any farther behind? Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-396924 Share on other sites More sharing options...
mackcat12 Posted April 17, 2018 Author Share Posted April 17, 2018 My dealer adjusted the valves installed a new gasket for the dpf filter and did all the updates, the new gasket stopped the squealing I was hearing and the valve adjustment made it quieter other than that it’s still low on power bad lugging and vibration really noticeable from 9th to 12 gear so I took it to another Mack dealer yesterday to be put on the dyno I was not impressed at all with them they maybe spent 20 min with my truck they wasn’t interested in anything I had to say,said it was getting the right power it’s a 425 hp and said they saw a high of 430 but they wouldn’t listen to me about the lugging and vibration. They were supposed to send all the info to the dsm and he said he was going to have engineering look at it and call me when they know something. I have been wondering if the Ecm got damaged from all the welding they done on the truck when the dump body and hitch was installed I’m going to talk to them about that and see if they can check that out, so the saga continues! Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-396963 Share on other sites More sharing options...
mackcat12 Posted April 19, 2018 Author Share Posted April 19, 2018 Talked to the dsm today he said he wants to put a data recorder on my truck and have me drive it for a week and let it record everything it’s doing then may they can figure out what the hell is wrong with this thing!!! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52210-2018-mp7-turbo-problems/page/3/#findComment-397156 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.