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
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
6,287 satisfied customers
Presenta el siguiente código de falla mid 144 psid 200 fmi
Presenta el siguiente código de falla mid 144 psid 200 fmi 9 … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I'm working on a 07 mack cxu613 mp8 has active coDes 128 84
I'm working on a 07 mack cxu613 mp8 has active coDes 128 84 fmi 9 & 5 also 144 84 9I've replaced road speed sensor at trans. Tailshft … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,287 satisfied customers
I diagnosed Mack mp8 year 2014, the fault code is P20EE FMI
i diagnosed Mack mp8 year 2014, the fault code is P20EE FMI 00 AND P103C FMI OCCURED .what is the possible cause of these codes how to proper diagnose, how to read temp and diff pressure sensor readin… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,287 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
6,287 satisfied customers
Gday. I have a Mack trident 2010. The display is showing
Gday. I have a Mack trident 2010. The display is showing fluctuating voltage from 10-13volts. Measuring with multimeter 12.8 at batteries 12.6 at fuse main power supply … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,287 satisfied customers
I have a 2012 mack with a mp8 engine. Getting codes mid128
I have a 2012 mack with a mp8 engine. Getting codes mid128 spn1127 fmi14 and spn94 fmi18 . Truck starts and idles perfectly. The vibration starts when loaded and accelerating when engine reaches 50mph… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,287 satisfied customers
2010 mack chu 613 PSID 46 FMI 0 and PPID 270 FMI 9. 2010
2010 mack chu 613 PSID 46 FMI 0 and PPID 270 FMI 9 … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,287 satisfied customers
I have a 2010 Mack with a MP8 engine. I was wanting to know
I have a 2010 Mack with a MP8 engine. I was wanting to know if a turbo charger super charger from a 2013 Mack MP8 engine would work on the later model engine ?… read more
Kent Van Wagner
Kent Van Wagner
40 satisfied customers
2011 Mack MP8 lost power. Now it turns over good but kicks
2011 Mack MP8 lost power. Now it turns over good but kicks out before it starts … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,287 satisfied customers
My Mack mp8 is losing power under load turbo seem to be
Hi My Mack mp8 is losing power under load turbo seem to be showing boost no active codes but has inactive codes mid128 Psid44 fim14 and mid128 psid45 fim14 and they will not clear … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,287 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
6,287 satisfied customers
2010 Mack CHU MP8 engine. Throwing code MID128 SID27 FMI7 I
2010 Mack CHU MP8 engine. Throwing code MID128 SID27 FMI7 I think its the egr position sensor? The exhaust is running hot. I recently had a head, valves, injectors and engine wiring harness replacemen… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have a boost problem drivine on flat road it fine comes
I have a boost problem drivine on flat road it fine comes to a little hill it dies change turboe egr etc still nothing even the mack up grades . frustating … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have a 2007 Volvo VNL with a D12 with a auto trany and i
I have a 2007 Volvo VNL with a D12 with a auto trany and i have loss of power and it will not go over 1500 rpms when in Neutral and its very slow. I have replaced both egrs because there where codes f… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
38,326 satisfied customers
I have a 2010 Mack chu truck mp8 engine that quit going down
I have a 2010 Mack chu truck mp8 engine that quit going down road backfired and shut down it won't crank over checked every fuse powe to dash has codes of mid140ppid278fmi9 def gage reads empty but fu… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
We have a fleet of Mack trucks with mp8 engines injector cups
We have a fleet of Mack trucks with mp8 engines injector cups last about a year then need replacing and they start leaking I took a new stainless cup and had a close look at machining inside it showed… read more
Toby
Toby
Vocational, Technical or Trade Scho
107 satisfied customers
Hi, we have a mack truck ch 613 e7 engine with the following
Hi, we have a mack truck ch 613 e7 engine with the following problem. While driving the truck after an hour the electrical mal function light goes on and the engine loses power suddenly. we just turn … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 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