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
2012 kenworth t800. Turbo stopped working. It spins freely
2012 kenworth t800. Turbo stopped working. It spins freely and feels tight but I have no turbo boost when driving. He400vg… read more
NicholasM1019
NicholasM1019
Diesel Technician
Vocational, Technical or Trade School
8 satisfied customers
My truck was deleted over a year ago. He couldn't delete the
My truck was deleted over a year ago. He couldn't delete the egr valve on that particular truck. Trucks has lost tremendous amount of power almost like starving for air or fuel. Mack place cant figure… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 satisfied customers
I have a 2010 freightliner Cascadia with a dd15 engine it is
i have a 2010 freightliner Cascadia with a dd15 engine it is slow at take off and when it gets around 1200 or 1250 rpm it has power and goes we replaced the fuel filters there was a small fuel leak we… read more
BrentR718
BrentR718
8 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
Triage Tech/Shop Foreman
Associates
431 satisfied customers
I have a Mack MP8 445 with lose of power issue. Changed fuel
I have a Mack MP8 445 with lose of power issue. Changed fuel filters still having the issue … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 satisfied customers
Any look on the fix. Luck. Code mid128 sid232 fmi4 replaced
Code mid128 sid232 fmi4 replaced pedal, intercooler, boost, oil pressure, oil pressure/temp, fuel temp and the one on the side of oil pan code pops up after truck running for about 3-4 hrs after shutting it off it will go away after 30min to an hour then a few hours later it comes back on and I lost boost again, it has egr delete and Ecu flashed like 6 months ago… read more
AMANDEEP MAHERU
AMANDEEP MAHERU
1 satisfied customers
I have a 2009 Mack Granite gu713. It's asking for a regen
I have a 2009 Mack Granite gu713. It's asking for a regen but when I try to do it it stops 10 minutes later and asks to do it again. I've hooked my laptop on it to do a forced regen and same thing it … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 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
Triage Tech/Shop Foreman
Associates
431 satisfied customers
We have 2015 Mack with a Eats system fault code that came up
We have 2015 Mack with a Eats system fault code that came up after we changed the oil,oil filter and fuel filter. After we shut the truck off then started it again it had gone away. Do we need to addr… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 satisfied customers
I have a 2008 Ford F350 with a 6.4L diesel and I am
I have a 2008 Ford F350 with a 6.4L diesel and I am experiencing a no power issue. It does ok off the line but falls on its face at 25-30 mph. It has a dpf delete and tuner, egr delete, an air dog fue… read more
Chris (aka-Moose)
Chris (aka-Moose)
Technician
Vocational, Technical or Trade School
353 satisfied customers
Have a 2011 mack with a mp8 engine whining sound from engine
Have a 2011 mack with a mp8 engine whining sound from engine at 25psi of turbo boost then it shoots up to 38psi of boost … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 satisfied customers
We have a 2009 Mack Granite GU813 with a MP7 engine. The
Hi there We have a 2009 Mack Granite GU813 with a MP7 engine. The truck initially had an egr valve fault code when we went out to it first. The truck has low power and had a DPF delete. The only activ… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 satisfied customers
Need to force regen on Mack MP8. The sensors went out. 2014
Need to force regen on Mack MP8. The sensors went out … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,361 satisfied customers
2010 Mack Granite mp8 engine has fault "PID:411 FMI:14
2010 Mack Granite mp8 engine has fault "PID:411 FMI:14 Differential pressure of the engine recirculated exhaust gases. - Special instructions. Cleared this fault and ok. After days work with truck fau… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Under load on or steep incline it starts to get a miss along
Under load on long or steep incline it starts to get a miss along with some black smoke … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
Mack Trident - Australia model: I'm in Australia and have a
I'm in Australia and have a mack mp8 engine. The early one that was egr. I'm having trouble with the egr valve, it's new and like the old one before it from 10% engine load to 75% engine load the valv… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,361 satisfied customers
2008 Mack Granite GU 813. MP8 engine. lighting bolt is
2008 Mack Granite GU 813. MP8 engine. lighting bolt is on @ dash. blue regen switch is blinking. performed regen. before and after having dpf filter cleaned both lights are still on.(blinking regen sw… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,361 satisfied customers
Just rebuilt a 07 isx with a pdi delete used timing wedges
Just rebuilt a 07 isx with a pdi delete used timing wedges and set the backlash. Engine starts and runs beautifully but am getting very little boost and smokes black under medium to hard acceleration… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 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

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,234 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

4,023 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

4,361 satisfied customers

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

cumminsdr

cumminsdr

Mechanic

1,700 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

1,571 satisfied customers

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

Chris (aka-Moose)

Chris (aka-Moose)

Technician

353 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