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Need to talk to a master tech.m It is spitting and
Need to talk to a master tech.m It is spitting and sputtering. … read more
Mike D
Mike D
Mechanic Shop foreman
diesel technology
2 satisfied customers
Mack GU813 vin: ***************** getting codes P006964
Mack GU813 vin: ***************** getting codes P006964 Manifold absolute pressure barometric correlation INACTIVE P02D400 Cylinder 5 injector offset learning at min limit ACTIVE P040B64 EGR temp sens… read more
Mike D
Mike D
Mechanic Shop foreman
diesel technology
2 satisfied customers
2014 mack with a cxu 613 mp7 and im having issues with this
2014 mack with a cxu 613 mp7 and im having issues with this engine having high crankcase pressure and is pouring it out of the pcv assembly, down to the vent tube. we have done an overhaul on it and b… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
I have a mecanical problem with my truck, its a Mack Granite
I have a mecanical problem with my truck, its a Mack Granite 2008 with a MP7 engine, trouble with injectors, do you have an expert for my problem? A french expert will be the best but I can understand… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 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 engine oil coming from the crankcase filter while
I have engine oil coming from the crankcase filter while driving. I changed the crankcase module but it does the same thing … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
2014 Mack 2014 Mack pinnacle dump truck, 215k miles, MP8
2014 Mack 2014 Mack pinnacle dump truck, 215k miles, MP8 engine & 10 speed transmissionIt was converted to a dump truck around 150k miles.Dash assembly looks like the truck was originally outfitted wi… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
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Im looking at a 1999 Mack RD688S tandem axle dump truck, ive
Second opinion] Im looking at a 1999 Mack RD688S tandem axle dump truck, ive actually only seen it on line, when speaking with dealer I ask him if it had a locking differential, he said there was no s… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
Im looking at a 1999 Mack RD688S tandem axle dump truck, ive
Im looking at a 1999 Mack RD688S tandem axle dump truck, ive actually only seen it on line, when speaking with dealer I ask him if it had a locking differential, he said there was no switch in which t… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
Dpf problems. 2011 Mack mp7. Called for forced regen....soot
called for forced regen....soot index at 88% failed regen took filter off to get baked and reinstall along with inlet nox sensor and regened it to 0% soot level but yellow inhibit switch is still blinking … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
I have a Mack MP8 445 with lose of power issue. Changed fuel
I have a Mack MP8 445 with lose of power issue. Changed fuel filters still having the issue … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
Spn 5394 Fmi 17 code keeps coming up after I regen. 2012
Spn 5394 Fmi 17 code keeps coming up after I regen … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
I have a 2012 Mack with an MP7. It has an SPN 5246 FMI 0
Hi , I have a 2012 Mack with an MP7 . It has an SPN 5246 FMI 0 codes and the truck is on de-rate . … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
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I noticed that Jeremy was online and has extensive
I noticed that Jeremy was online and has extensive experience diagnosing diesel engine problems. I have a 2009 Mack MRU that is producing engine malfunction code PPID 326 FMI 11, and I was wondering i… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
Having problems with a 2014 mack MP8. Truck seems to buck or
Having problems with a 2014 mack MP8. Truck seems to buck or shudder around 1400 rpm. Seems to be more of an issue when cool in the morning. Truck is starting fine. Injectors were updated with stainle… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
2007 MP7 runs good in lower ear but looses power in higher
2007 MP7 runs good in lower ear but looses power in higher gear (spped ) no manifold pressure … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
14,879 satisfied customers
11 mack gu 713. message on drivers dash says 5mph derate
11 mack gu 713. message on drivers dash says 5mph derate removed def quality being evaluated … read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
38,729 satisfied customers
I am having problem with a 2008 gu 713 mack. It runs
I am having problem with a 2008 gu 713 mack. It runs for 5 miles and shuts down and very hard to start using starter fluid. Any suggestions. We replaced all the filters.… 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

14,879 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

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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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