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
Mack MP8 fuel primer pump is taking forever to prime, truck
Mack MP8 fuel primer pump is taking forever to prime, truck won't start, checked for double gaskets and for leaks. There is no leaks … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 satisfied customers
I am working on a 2019 Mack mp8 engine truck will start with
I am working on a 2019 Mack mp8 engine truck will start with manual primer pump but will die shortly after does this engine use a electric fuel pump?… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 satisfied customers
I have a 2014 mack cxu 613 with the mp8 engine. I just
I have a 2014 mack cxu 613 with the mp8 engine. I just replaced the cam on it. I wanted to know what the break in procedure is for the new cam… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 satisfied customers
Speedometer quits working and the truck loses power. 2013
speedometer quits working and the truck loses power. 2013 mack mp8 … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 satisfied customers
2012 Mack with mp8 vin ***************** would like labor
2012 Mack with mp8 vin ***************** would like labor time for fuel filter housing and injector cups thanks… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
I have a 2012 mack pinnacle with a mack mp8 engine. I have
I have a 2012 mack pinnacle with a mack mp8 engine. I have no check engine lights on. I see rpms. The fuel bowl has fuel. It cranks and coughs, but no fire. Runs on ether. No bubbles in the fuel bowl … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
I have a 2015 Mack chu613 with MP8 motor, at times engine
I have a 2015 Mack chu613 with MP8 motor, at times engine will crank but not turnover. I was driving down the road and lost power, my RPM no higher than 1200 and dropped from there, engine shutdown, w… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 satisfied customers
Have a 2012 mack cxu613 mp8. Having trouble starting. Had
Have a 2012 mack cxu613 mp8. Having trouble starting. Had been priming filter by pushing the plunger on filter housing for 10-15 minutes it would eventually crank. Taken off line going to pressure rel… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 satisfied customers
I have a Mack SXU VISION 2014 with motor D13 MP8. I have a
Hi, I have a Mack SXU VISION 2014 with motor D13 MP8. I have a leak in the exhaust leak with the smell of oil and gasoline I have checked the head and the turbo, and both are good Does anyone know wha… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 satisfied customers
Have a 2014 mack. Changed the ignition switch a few days
Have a 2014 mack. Changed the ignition switch a few days ago. Drove the truck home it sat a few days now it turns over and not start.… read more
Bradey V
Bradey V
Certificate
2012 Mack mp8, fuel filter base/housing has a manual pump to
2012 Mack mp8, fuel filter base/housing has a manual pump to fill filters manually, that manual pump will not stay in … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 satisfied customers
2012 MACK MP8 ENGINE WERE IS THE CHECK VALVE FOR FUEL SYSTEM
2012 MACK MP8 ENGINE WERE IS THE CHECK VALVE FOR FUEL SYSTEM TRUCK BLEEDS BACK FUEL AFTER SITTING AWILE… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 satisfied customers
2009 Mack GU713 with a MP8-425M Hard start when sits
Second opinion] 2009 Mack GU713 with a MP8-425M Hard start when sits overnight cranks over then shuts off … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
I have a mp8 Mack with rough idle but runs good at full
I have a mp8 Mack with rough idle but runs good at full speed … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 satisfied customers
We put stainless injector cups with new injectors in a 2015
We put stainless injector cups with new injectors in a 2015 MP8 engine. We have all the trim codes programmed and it still will not crank. Turns over fine and the system is primed any help? … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 satisfied customers
I got a 2017 mack mp8 445 and i have a fault code SPN 5357
Hi i got a 2017 mack mp8 445 and i have a fault code SPN 5357 FMI17 it says fuel injection quiantaty error for multiple cylinders … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 satisfied customers
2012 mack with a mp8 runs fine until put under a load then
2012 mack with a mp8 runs fine until put under a load then dies restarts easily idles fine … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,447 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
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