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
Triage Tech/Shop Foreman
Associates
561 satisfied customers
I have a 2013 Mack GU533 vin#***************** that will
i have a 2013 Mack GU533 vin#***************** that will have the red engine shut down light come on once and a while and derate the engine. I just replaced the doser valve and had the DPF filter clea… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,886 satisfied customers
2012 International Maxxforce engine. Serial # 5012961295 No
2012 International Maxxforce engine. Serial #(###) ###-####No crank. It Says battery high on dash. A Yellow upside down triangle Is lit up on dash. batteries were changed earlier today and forgot to c… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
561 satisfied customers
I have fault code Sid 231 FMI 5. Description J1939 open or
I have fault code Sid 231 FMI 5. Description J1939 open or short circuit … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
14,365 satisfied customers
How are you I have a 2012 Mack CXU day cab with a Mac mp8
Good morning how are you I have a 2012 Mack CXU day cab with a Mac mp8 engine and I'm getting a trouble code SID 231 j 1939 data erratic I've attached a picture of the VIN number end of the trouble co… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
561 satisfied customers
My name it's Enrique I have a Mack truck 2005 it's giving me
Hi my name it's Enrique I have a Mack truck 2005 it's giving me a code sid231 FMI 8 active after I replaced wiring harness … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
561 satisfied customers
Att Mack tech —-Have a Mack truck here vin y28m001887. The
Att Mack tech —-Have a Mack truck here vin y28m001887. The customer had vecu go out as Truxk would not start he got one from salvage yard now it all starts but speedometer is not working and giving sp… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
561 satisfied customers
15 mack td713 mp10 engine have mid144 psid204 fmi 9 mid 144
15 mack td713 mp10 engine have mid144 psid204 fmi 9 mid 144 psid 200 fmi9 mid144 sid 231 fmi1 mid 206 psid2 fmi5 mid 140 pid158 fmi1 mid 206 sid254 fmi4 … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
561 satisfied customers
I have a brake ECU m i d 136 code. 2007 Mr Mack garbage
Yes I also have a engine ECU mid128 code and I have a vehicle ECU in my D14 for data link code and my check trans light keeps coming on and it comes up with code you 0 1 5 5… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
14,365 satisfied customers
I have a fault code 128 231 8 Sid. I looked online and it
Hi! I have a fault code 128 231 8 Sid. I looked online and it says abnormal frequency. What does that mean? … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
I am switching out a 2005 Mack engine and replacing with a
I am switching out a 2005 Mack engine and replacing with a 2007 Mack engine. Everything hook up except a connector bracketed to engine--seems as if it is from ECU-- 2005 is round (15 wire) connector a… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
14,365 satisfied customers
Sid 231-fmi-8. mack, 1998 mack mack mtr, im a repair shop,
im a repair shop, we have checked all connections and batteries, also pulled bulk head connectors apart and cleaned,, ecm cam locks are clean no corrosion … read more
Expert
Expert
10,505 satisfied customers
I have a sid 231 FMI (8) Engine AI 350, Mack. Granite 2003,
I have a sid 231 FMI (8) JA: What's the make/model/year of your truck? Engine type? Customer: Engine AI 350 JA: Are you fixing your truck yourself? What have you tried so far? Customer: Mack. Granite … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
14,365 satisfied customers
I have 2004 dm690s Mack with a code 128 231 8 Sid, I know it
I have 2004 dm690s Mack with a code 128 231 8 Sid , I know it for j1939 data link, abnormal frequency pulse. Width, or period. I check the plugs and the wire harness. On one of the wire for j1939, the… read more
Doug Barnowski
Doug Barnowski
HD truck tech
14 satisfied customers
I'm not sure if all of the these symptoms are related, but I
I'm not sure if all of the these symptoms are related, but I have a 2000 Mack RD688s that has the Electronic Malfunction Light & Parking Brake Light remain on with the ignition off and key out. I retr… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
14,365 satisfied customers
2004 Mack cx613 460 vin 1m1ae07y74n016111 Engine blink code
2004 Mack cx613 460 vin 1m1ae07y74n016111 Engine blink code 6-4 Low power, engine misses on acceleration (intermittent), rpm limited to 1300 both on idle and driving(intermittent) cruise or high idle … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
14,365 satisfied customers
I have a mack midliner g260. I cant find info on tappet adjustme
I have a mack midliner g260. I can't find info on tappet adjustment any where. Can you help?… read more
Toby
Toby
Vocational, Technical or Trade Scho
107 satisfied customers
We have a 2004 Mack Granite and the headlights will intermitantly
We have a 2004 Mack Granite and the headlights will intermitantly stay on and not shut off. Disconnection of the bettery solves the problem, but not a good option on an ongoing basis. Do you have an e… read more
Jim
Jim
Diesel tech.
212 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

14,365 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