Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have a 2019 Mac truck we change the fuel and oil filters
I have a 2019 Mac truck we change the fuel and oil filters and ran for about a minute and shut off .. I never had a problem the Mack Truck The last eight LM 018433 the fuel filter that I used is made … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
581 satisfied customers
I have a 2014 mack granite series with a spn 1127 fmi 1
i have a 2014 mack granite series with a spn 1127 fmi 1 code. i need to know where to start. … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
581 satisfied customers
I have a 2005 mack granite that blew out the exhaust gasket
I have a 2005 mack granite that blew out the exhaust gasket I replaced the gasket and installed new injector lines and now I have a miss and am getting fuel in my oil … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
581 satisfied customers
My 2008 Mack is showing fuel restrictions and running
My 2008 Mack is showing fuel restrictions and running poorly … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,947 satisfied customers
I have mp7 start good but when running shut off. Mack 2007
Hi I have mp7 start good but when running shut off … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
581 satisfied customers
2017 mack granite has grade gripper malfunction, abs cannot
2017 mack granite has grade gripper malfunction, abs cannot be detected, and vehicle speed erattic, its reading 156 mph when vehicle is stopped according to j pro … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
I have a 2013 Mack with an MP7. Having an issue with fuel.
I have a 2013 Mack with an MP7. Having an issue with fuel. We have changed the injectors, injector cups, fuel filter base, pump, cleaned out tank, fuel filters, check valves and replace both hose that… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
581 satisfied customers
Have a 2000 mack rd688s.Driver said it was using 2 gallons
Have a 2000 mack rd688s.Driver said it was using 2 gallons engine oil a day. He also said it was blowing a heavy stream of white smoke, especially when jake brake was on. When i test drove it i for th… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
581 satisfied customers
Will turn but will not fire. 2006 Mack Granite with AMI_370
will turn but will not fire. 2006 Mack Granite with AMI_370 engine. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
Got a 2009 mack gu713 when it gets hot and you shut it off
got a 2009 mack gu713 when it gets hot and you shut it off will crack for every and not start again only when hot not building fuel pressure let sit for awhile and cool off starts right back up … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 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
1,947 satisfied customers
We have 4 Mack Granites, 04, 05, 06, 07 (370-410) all have
We have 4 Mack Granites, 04, 05, 06, 07 (370-410) all have the same problem which is running out of power on incline and surging at times. Mack can't fix this do you have a solution. Thanks Johnny … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have a 2007 mack granite with a mp7 motor, abs light on no
i have a 2007 mack granite with a mp7 motor, abs light on no start … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,756 satisfied customers
I have 05 Mack cv713 granite and I am getting diesel fuel in
I have 05 Mack cv713 granite and I am getting diesel fuel in the radiator overflow tank. What could be the cause of this? I keep blowing hoses as well, but the truck is not over heating.… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
This question is for Wayne: Would tell me where can we get
This question is for Wayne: Would tell me where can we get a good deal in buying Mobil Delvac and Shell Rotella engine oil? We tried to buy Mobil Delvac from Napa but it seems very expensive. For one … read more
cumminsdr
cumminsdr
Mechanic
High School or GED
4,463 satisfied customers
I have a fuel tank (1,000 gal.) mounted on the frame of a Class
I have a fuel tank (1,000 gal.) mounted on the frame of a Class 8 straight truck (GVWR 54,000 lbs). The tank contains UN1863, PGIII, Jet-A Turbine Fuel used for helicopter applications. I am building … read more
peterbeck84
peterbeck84
2 satisfied customers
peterbilt 357: 1994 Cummins N14 engine Problem - acts like
1994 Cummins N14 engine Problem - acts like it runs out of fuel - it dies and the fuel filter is half full - wait for 15 mins and it witll start and run until the fuel filter is half full Have replace… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
I have a 2007 mack granite with a cv713 engine and have
i have a 2007 mack granite with a cv713 engine and have changed out all fuel lines and replaced all fuel filters the truck does not respond in high gears it acts as if fuel is being shut off and if u … read more
jrloar
jrloar
Master HVAC Tech.
Associate Degree
57 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

6,062 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

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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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