Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have 2002 cv713 mack noy have power full aceleration. No
I have 2002 cv713 mack noy have power full aceleration … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
I have a 2003 Mack Mr e-7 Two questions. Engine position
I have a 2003 Mack Mr e-7 Two questions. Engine position sensor code coming up. How can I test if sensor is bad or not getting enough volts to sensor using a multimeter. Also the fan clutch on 2007 Ma… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
571 satisfied customers
I have a 2003 Mack Mr Inactive data link code 1587 keeps
I have a 2003 Mack Mr Inactive data link code 1587 keeps coming up. Truck not taking fuel as it should, hesitates then will pkup speed and smooth out with slight surge back and forth. I have the diagr… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
14,498 satisfied customers
1587 data link line on vecu on Mack Mr truck trouble code
1587 data link line on vecu on Mack Mr truck trouble code keeps coming up 1587/1708 Truck surges, not accepting fuel hesitates a lot taking off missing but all injectors and cylinders firing. I unders… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
571 satisfied customers
Have a 2003 Mack Mr trash truck Data code 1587/ 1708 vecu
Have a 2003 Mack Mr trash truck Data code 1587/ 1708 vecu comes up DTC Finally found print out on pins location and identifier. Found those data link wires going into vecu as well as battery source .s… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
14,498 satisfied customers
I have a 2001 mack Mr truck trash truck Truck knocked off
I have a 2001 mack Mr truck trash truck Truck knocked off all of a sudden today No key switch function. Only lasted 2 sec. Hear click click with no warning light able to come up Scanner stated no comm… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
571 satisfied customers
I have a 2003 Mack Mr garbage truck Code j1708/j 1587 keeps
I have a 2003 Mack Mr garbage truck Code j1708/j 1587 keeps coming up data link VECU by vmac111 scanner. These I believe are the non critical data lines but evidently interfering with performance. The… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
571 satisfied customers
I have data link code coming up on 2003 Mack MR. VECU
I have data link code coming up on 2003 Mack MR. VECU 1708/1587 Tried and replaced ECM, vecu. Checked grounds, shook wiring every where. No impactStumbles some under strain and smokes occasionally fro… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
571 satisfied customers
Have 2003 mack truck. Mr model. Truck surges and misses
Have 2003 mack truck. Mr model. Truck surges and misses under heavy load at times and at 3rd or 4th shift consistently. Vmac3 scanner says sid 250 data link problem. Replaced ecm wire harness. No chan… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
14,498 satisfied customers
I have 2003 mack Mr trash truck Problem with truck surging
I have 2003 mack Mr trash truck Problem with truck surging and loosing power,stumbling going up hills under strain. Tried a lot- replaced no.3 rip and no.3 nozzle injector came up on scanner.installed… read more
JimmyM827
JimmyM827
Bobcat specialist
Automotive technologies
70 satisfied customers
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
571 satisfied customers
I have a 2003 mack MR truck. 2003 Mack Mr truck E-7 engine.
2003 Mack Mr truck E-7 engine. Problem with truck stumbling some. Inactive code keeps coming up no 3 eup. and data link. Active code is fan clutch output which I assume wouldn't cause truck not to take fuel at Times and then pkup again. I have replaced number 3 eup and injector nozzle. Also replaced transfer pump and cam sensor. Wiring seems good. 4 volts going to every eup and pulse is the same on every eup. Haven't programmed rip but was told rarely that is a problem and I have swapped eup before never a problem. I have. Good software that trouble shoots coded and solutions. At a loss. Have own macks. 30 yrs. … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
571 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
571 satisfied customers
Help / Need top notch mechanic advise from the best Volvo
Please help / Need top notch mechanic advise from the best Volvo truck mechanic technician !!!!!!!!! / Have had a good Volvo truck mechanic working on my 2004 Volvo 780 for about 2 days / When brought… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
571 satisfied customers
I have a ch613 showing a 6-3 fault on electric malfunction
I have a ch613 showing a 6-3 fault on electric malfunction light. When I disconnect the fic unit it goes to a 6-2 fault. And all checks in harnesses seam ok? … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
571 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
10,510 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
14,498 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
2,756 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

14,498 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

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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.

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

cumminsdr

cumminsdr

Mechanic

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All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

641 satisfied customers

24 years of experience diagnosing & repairing

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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.

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