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
Number one cylinder missing put new injector pump and
number one cylinder missing put new injector pump and injector in still missing on one its a 1998 mack 400 hp … read more
james Roberts
james Roberts
Maintenance assistant
Vocational, Technical or Trade School
3 satisfied customers
I have a 03 Mack mv322 they put a new ignition and anti
I have a 03 Mack mv322 they put a new ignition and anti theft light is on. The truck will crank but won't fire up … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,196 satisfied customers
Have a 2016 mack runs perfect when cold when engine warms up
Have a 2016 mack runs perfect when cold when engine warms up fuel pressure goes from 33000 to 8000... changed the regulator and pressure sensor … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
389 satisfied customers
Where is the fuel transfer pump located on an MP8 425E Mack
Where is the fuel transfer pump located on an MP8 425E Mack engine ? … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
389 satisfied customers
X. 2003 mack RD688s e7 etech 350 engine. Will not start, it
2003 mack RD688s e7 etech 350 engine. Will not start, it only cranks. I have eliminated any problem from the fuel tanks. I have a line running from a separate fuel container. I've replaced the Crank sensor and the Engine speed sensor. still no luck … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
389 satisfied customers
I have a C-13, SN KCB09401, in a 2007 Pete. It has
I have a C-13, SN KCB09401, in a 2007 Pete. It has intermittent no start condition. Will crank, just wont fire. Ck'd fuel supply, OK, hooked up psi gauge, fuel psi is 85 psi. cracked return line at he… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
Mack quantum the lad run it out of fuel .filled up but cant
Mack quantum the lad run it out of fuel .filled up but cant fire it … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,196 satisfied customers
I have a 1991 mack truck with a mack pedigree motor beleave
I have a 1991 mack truck with a mack pedigree motor beleave its a 400. part# ***** 3514 and s/n # ***** the vin reads 12mp270c3mmo10947. … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I have a 99 mack the came into my shop missing on cylinder
I have a 99 mack the came into my shop missing on cylinder number 5 after it warms up replaced injector and unit on that cylinder and is still the same thing will miss after it gets hot check the volt… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
Dan we have an ex-garbage truck maybe 2000 model with a D7
Dan we have an ex-garbage truck maybe 2000 model with a D7 Volvo engine. The truck was going along and just quit running. Fuel is at the pump but not coming out the lines at all. Can't get 12 volts to… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
2000 mack cl 713 etech 427 engine. engine misses after rolling
2000 mack cl 713 etech 427 engine. engine misses after rolling and/or idles for a while. does not happen in cold weather does it after 45-50 degrees outside. all uni pumps tested and are ok. transfer … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,196 satisfied customers
I have a 2006 mack that has a a1-427 engine and it just stalled
I have a 2006 mack that has a a1-427 engine and it just stalled and wont start again. I have fuel coming out of the secondary filter to the switch of some sort but no fuel going to the injectors. Any … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,196 satisfied customers
I am changing injection pump on 1995 mack E7 454 engine how
I am changing injection pump on 1995 mack E7 454 engine how do I time injection pump before removal .… read more
tkman55
tkman55
Shop manager Trailer Refrigeration shop
138 satisfied customers
i have a 1987 mack with a bosch fuel pump it want start i have
i have a 1987 mack with a bosch fuel pump it want start i have fuel going to the pump but it's not coming out the top of the pump to the injector lines… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
i have a 1995 mack dumptruck with the vin number 1M2P267C9VM029858
i have a 1995 mack dumptruck with the vin number 1M2P267C9VM029858 MODEL NUMBER RD588S the owner had fuel issues with it and yesterday it just stopped working the injection pump voltage is looking lik… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,196 satisfied customers
i have 1994 mack with e7 454 driving it cuts out i have to
i have 1994 mack with e7 454 driving it cuts out i have to turn key off and on several times to get it going sometimes it runs all day without a problem other days constant problems anybody got a clue… read more
Expert
Expert
i have a 1994 clr with a v mack engine engine shuts down intermitently
i have a 1994 clr with a v mack engine engine shuts down intermitently fault code 54 i have to turn the key on and off to get it going again and sometimes the engine revs on its own i have to turn it … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,196 satisfied customers
I have a 2000 mack ch 613 E7-460. Motor shut down without
I have a 2000 mack ch 613 E7-460. Motor shut down without showing engine shutdown light coming on. or showing any engine codes. We been trying to get it restarted by FRIST checking if we have fuel 2nd… read more
diesel-tech
diesel-tech
Owner of landrys truck repair llc
136 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

11,196 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

2,740 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