Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Connect one-on-one with {0} who will answer your question

Related Medium and Heavy Trucks Questions
I have a 2015 Mack CXU, just spent $15k at Mack dealer on
I have a 2015 Mack CXU, just spent $15k at Mack dealer on DPF, Knox Sensors, EGR value…left the dealer yesterday and truck is back in Derate. Help!!… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,292 satisfied customers
I have a 2012 Freightliner that has the CEL on and the red
I have a 2012 Freightliner that has the amber CEL on and the red stop light on. Need help with the diagnostics… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
I have a 2012 mack chu613 with an mp8 in it it keeps giving
I have a 2012 mack chu613 with an mp8 in it it keeps giving me a scr performace low service scr system and parked regen needed and the truck is derated … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,292 satisfied customers
I'm in 5mph Derate on my 2015 Mack cxu613, MP8 engine. No
I'm in 5mph Derate on my 2015 Mack cxu613 , MP8 engine … read more
Joe Green
Joe Green
66 satisfied customers
SA 16 DTC P24D100, SA 16 DTC P24AF00 have these codes on my
SA 16 DTC P24D100, SA 16 DTC P24AF00 have these codes on my 2018 Volvo Val … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,292 satisfied customers
My truck only have 15 psi turbo pressure what could be the
My truck only have 15 psi turbo pressure what could be the problem … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,292 satisfied customers
I have a 2013 Mack CHU613 with the MP8 engine. 2013 Mack
-SPN 1072 FMI 4 -SPN 1127 FMI 18 -SPN 647 FMI 5 -SPN 4811 FMI 2 -SPN 4813 FMI 4 -SPN 1265 FMI 4 -SPN 3936 FMI 0 -SPN 1127 FMI 10 -SPN 1127 FMI 14 -SPN 411 FMI 7… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,292 satisfied customers
2012 Freightliner with Cummins ENG SER # 73295803 had a code
2012 Freightliner with Cummins ENG SER # 73295803 had a code 2637 DOC clogged... had had DOC and DPF cleaned, there was a lot of soot in the intake air and exhaust, the aftercooler off and had it flus… read more
Expert
Expert
10,510 satisfied customers
I hope this finds you well, I'm still working with this 2012
Hi Mike I hope this finds you well, Mike I'm still working with this 2012 Mack CHU613 with the mp8 that you were helping me with we finally got it running I had to replace the ECM and put back the dpe… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,292 satisfied customers
2009 detroit dd15 with very slow throttle responses up to
2009 detroit dd15 with very slow throttle responses up to 1200 to 1300 rpm then its got plenty of power … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,756 satisfied customers
2012 mack psid 46 fmi15 replaced both nox sensors and reset
2012 mack psid 46 fmi15 replaced both nox sensors and reset computer iding jaltest … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,292 satisfied customers
I have an engine code on a mack with an mp8 engine spn 1127
hello i have an engine code on a mack with an mp8 engine spn 1127 fmi 14 and spn 1127 fmi 18 … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,292 satisfied customers
We got a truck in the shop that we just did a DPF for clean
we got a truck in the shop that we just did a DPF for clean on and after a couple weeks is asking for a parked regen twice a week and it throwing code spn 5394 fmi 17. What should I be checking.Thanks… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,292 satisfied customers
My 2009 gmc topkick is messing up again. we ended up
my 2009 gmc topkick is messing up again. we ended up cleaning the cat and taking it to gm dealer the sent it to a truck shop to have the exaust brake wired and programed. the build sheet by vin said i… read more
Kent Van Wagner
Kent Van Wagner
40 satisfied customers
Mechanical problem, Mack 2014 CHU613 power steering quit and
Mechanical problem, Mack 2014 CHU613 power steering quit and a few miles down the road the engine derated or ran out of fuel. Towed to truck shop however they are having trouble diagnosing the problem… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,292 satisfied customers
2007 mack with an MP8 engine.The customer brought it to me
2007 mack with an MP8 engine.The customer brought it to me after spending over 20,000 at a mack dealer and having a delete done hoping it would fix his low power.i am not a Mack expert so it is a scho… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,292 satisfied customers
I recently retuned my MP8 deleted the DPF and egr and gave
I recently retuned my MP8 deleted the DPF and egr and gave it 48 more hp it now doesn't want to pull can hardly make 100 km per hour loaded … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
Mack mp8 2012 in derate no codes no check engine light no
mack mp8 2012 in derate no codes no check engine light no lightening bolt, service def on information screen won't let us take out of derate… read more
Expert
Expert
10,510 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Daniel Wilson

Daniel Wilson

6,062 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,353 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

5,115 satisfied customers

worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

2,756 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

Curtis B.

Curtis B.

Technician

1,947 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

cumminsdr

cumminsdr

Mechanic

1,886 satisfied customers

All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

641 satisfied customers

24 years of experience diagnosing & repairing

< Previous | Next >

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x