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Related Medium and Heavy Trucks Questions
Truck has loss of power. Barely do sixty miles an hour. Not
Truck has loss of power. Barely do sixty miles an hour. Not throwing a code but lightning bolt is on . What do you think that is … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,196 satisfied customers
I am working on a 2013 International RE rear engine school
I am working on a 2013 International RE rear engine school bus, this has the maxxforce DT engine. It originally was road called for check engine, stop engine lights, and no power, i went an assisted r… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,196 satisfied customers
Apologizing in adv for ?, but want to give you as much
Roy, apologizing in adv for long ?, but want to give you as much detail as possible. VIN AH4804. In Jan you helped me with Inj problem. we put 6 pack in, calibrated inj, changed fuel filters, test dro… read more
Expert
Expert
10,508 satisfied customers
Question is for Andy. We have a Mack mp8. 2011. Customer
Question is for Andy. We have a Mack mp8. 2011. Customer replaced turbo Actuator and brought it in for us to calibrate it but it still has active code 27For turbo actuator even cleared codes have Volv… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
We have a 2009 mack vin# ***************** Model chu613 we
We have a 2009 mack vin# ***** Model chu613 we are trying to fix a low boost problem it will not build more then 17 psi of boost we had low fuel psi around 70 75 psi changed filter housing injectors a… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,196 satisfied customers
I have a Commons CM871 Shut down light keeps on coming on
I have a Commons CM871 Shut down light keeps on coming on and off and I'm getting a code MID128 sid27 fmi 9 … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
I got a 2017 mack mp8 445 and i have a fault code SPN 5357
Hi i got a 2017 mack mp8 445 and i have a fault code SPN 5357 FMI17 it says fuel injection quiantaty error for multiple cylinders … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,196 satisfied customers
I have an engine code on a mack with an mp8 engine spn 1127
hello i have an engine code on a mack with an mp8 engine spn 1127 fmi 14 and spn 1127 fmi 18 … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,196 satisfied customers
Have a 2011 mack with a mp8 engine whining sound from engine
Have a 2011 mack with a mp8 engine whining sound from engine at 25psi of turbo boost then it shoots up to 38psi of boost … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,196 satisfied customers
Misfire under load. At 100% throttle 100% load according to
Misfire under load. At 100% throttle 100% load according to laptop. After initial misfire smooths out and has good power. … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
Still no power isx 2012 did a Delete to dpf engine was
Still no power isx cumming 2012 did a Delete to dpf engine was rebuilt at the time of delete im sure it not getting turbo boost check cac no leaks amd no exhaust leak and recal vgt… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 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
Shop Foreman/Triage Tech
Associates
6,196 satisfied customers
I have a C15 Acert MXS that has low power, low boost and
I have a C15 Acert MXS that has low power, low boost and high egt. Seems to get worse the longer the truck runs. Truck has been to a Peterbilt dealer and can't find any boost leak.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
From New Zealand, We have in our Fuel shop a Mack Granite
Hi There , My name is ***** ***** New Zealand , We have in our Fuel shop a Mack Granite MP8 EGR { deleted } truck that has been around the traps with extremely poor performance but very good fuel cons… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,756 satisfied customers
2007 ISX CM871 high exhaust temp and black smoke when foot
2007 ISX CM871 high exhaust temp and black smoke when foot in throttle. Truck seems to be down on power some. May not be but I don't think it has the power it should. Can I get some trouble shooting h… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have this ISX 671 at my shop i rebuild this engine 6
hello i have this ISX 671 at my shop i rebuild this engine 6 months ago since that it is having a issue of low pulling power the customer pulls around 60,000 lbs at the time of rebuild we used the aft… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
I have a 04 Mack that has a low power issue. We checked the
I have a 04 Mack that has a low power issue. We checked the intake system and found the cac leaking. replaced and same issue. the idle up seems really slow to me took 4.5 seconds on a stop watch to go… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
Mack MP8 EGR engine. It's in a Mack Trident ( Australian model.)
Mack MP8 EGR engine. It's in a Mack Trident ( Australian model.) used to haul triple roadtrains in Western Queensland and the Northern Territory. I have replaced the EGR valve and the new one is doing… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 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

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I am ASE Master Truck Certified.

Wayne

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worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

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ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

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Curtis B.

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cumminsdr

cumminsdr

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Chris (aka-Moose)

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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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