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
I have a 2007 mack MR trash truck E 7 My question is some
I have a 2007 mack MR trash truck E 7 My question is some one wired the rev up switch toggle directly to ecm or VECU. The rev up toggle should shoot electricity to sensor that is iniated by handle On … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
403 satisfied customers
Im trying to find a trouble shooting code for Rack Position
Im trying to find a trouble shooting code for Rack Position Sensor -Voltage above normal or shorted to high SID 24, FMI 3 … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
403 satisfied customers
Acceleration dies down to idle on and off with cruise
Acceleration dies down to idle on and off with cruise control and foot pedal … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
403 satisfied customers
05 MACK HAS CODE SDI 231 FMI 8 WILL NOT START HAVE CHECKED C
05 MACK HAS CODE SDI 231 FMI 8 WILL NOT START HAVE CHECKED C AND D CONECTER IT HAS 60 OHMS… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
403 satisfied customers
I am removing fuel injection pump from a 93-mack E7-400.
I am removing fuel injection pump from a 93-mack E7-400 . brought it close to #1 tdc to line up slot mark on pump. Is that all I have to do to remove frt gear and pump? … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
403 satisfied customers
Have a 2007 Granite with AI427 keeps throwing 3-1 code
Have a 2007 Granite with AI427 keeps throwing 3-1 code replaced exhaust temperature sensor still throwing same code … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
403 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
403 satisfied customers
Trying to time a 93 mack 350 with the vmac. 1993 Mack 350. I
I need to know where to install the kent moore j 37077 timing light … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
403 satisfied customers
I have a 1996 mack ch613 starts then dies as soon as it
I have a 1996 mack ch613 starts then dies as soon as it starts its getting a code of pid 183 fmi8 6-1 is the oem code cant find any trouble shooting for the code all its saying is no fuel request line… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
2015 volvo truck cruise don't activate. High idle does.
2015 volvo truck cruise don't activate. High idle does … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
403 satisfied customers
I've got a 6 4 flash code have checked resistance from abs h
I've got a 6 4 flash code have checked resistance from abs h and L circuit have 60 ohms. Tried used ecu and vecu no luck. Truck still only idles 900 rpm and will go into coolant shutdown before 150 de… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 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
403 satisfied customers
I have a Mack chu 2008 mp8 motor... engine will not go 1500
I have a Mack chu 2008 mp8 motor... engine will not go 1500 rpm's … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
403 satisfied customers
07 Mack MR688P trying to diagnose air operated radiator fan
07 Mack MR688P trying to diagnose air operated radiator fan clutch. Fan runs 100 % all the time, can ground solenoid and will shut off.… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 2004 Mack vision cx613 with low power and a fault
I have a 2004 Mack vision cx613 with low power and a fault of spn85 fmi 4. Checked wire for rubs at module on passenger kick panel. I am having trouble finding the right schematic of the wires. My sch… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Got a Mack truck with code SID 231 FMI 8, It starts and runs
Got a Mack truck with code SID 231 FMI 8, It starts and runs at a high Idle but will not accelerate.… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,361 satisfied customers
I HAVE A 1995 MACK CH613 TACTOR WITH A E7 MOTOR NOT GETTING
I HAVE A 1995 MACK CH613 TACTOR WITH A E7 MOTOR NOT GETTING ANY HEAT IN CAB REPLACED WATER PUMP,THEMOSTAT,HEATER CORE AND RADIATOR CAP AND ALSO TEMP SENSOR… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
35,324 satisfied customers
Hello. I have a 1999 Mack Ch613 with an E7 non-etec engine
Hello. I have a 1999 Mack Ch613 with an E7 non-etec engine that has an issue. After replacing a blown head gasket, we attempted to startup the engine, but blew the battery. We got a replacement batter… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,361 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