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Related Medium and Heavy Trucks Questions
Have a 2014 mack. Changed the ignition switch a few days
Have a 2014 mack. Changed the ignition switch a few days ago. Drove the truck home it sat a few days now it turns over and not start.… read more
Bradey V
Bradey V
Certificate
2008 GU8 Mack with MP7 engine It will start right up after
2008 GU8 Mack with MP7 engine It will start right up after it sits out in the cold for two day. Take it out and drive it up to temp, park it and shut it down for a few minutes and it cranks for 30 sec… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
387 satisfied customers
2009 Mack GU713 with a MP8-425M Hard start when sits
2009 Mack GU713 with a MP8-425M Hard start when sits overnight cranks over then shuts off … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
387 satisfied customers
I have bought a 1986 mack box truck i was told that it had a
i have bought a 1986 mack box truck i was told that it had a problem, but it will run with a hot of starter fluid and … read more
Bradey V
Bradey V
Certificate
2007 Mack CTP713 stalled after running for a few hours.
2007 Mack CTP713 stalled after running for a few hours. Changed dirty fuel filters, truck would only now start and run for a few seconds then stumble and shut down.… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
387 satisfied customers
Mp7 starts and runs for few seconds. 07 ctp713 Mp7. Working
Mp7 starts and runs for few seconds JA: What's the make/model/year of your truck? Engine type? Customer: 07 ctp713 Mp7 JA: Are you fixing your truck yourself? What have you tried so far? Customer: Yes… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
387 satisfied customers
I have another Mack mp7 question. I have a garbage truck in
I have another Mack mp7 question. I have a garbage truck in here now, it came in with a low power complaint. Basically it would barely pull its self. Dropped the fuel filters diesel fuel looked like l… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
387 satisfied customers
I have a 2007 mack with the 380 engine i shut truck down for
Second opinion] i have a 2007 mack with the 380 engine i shut truck down for the day and next morning it wont start it wont hold prime i have new fuel pump new filters and we cant get prime pulling of… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
Have a 450c case dozer ran find till last night now it will
have a 450c case dozer ran find till last night now it will run for about 5 mins and stop replaced fuel filter by past fuel tank with 5 gal can still 5 mins and stop can pump primer pump and start wit… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,190 satisfied customers
I recently retuned my MP8 deleted the DPF and egr and gave
I recently retuned my MP8 deleted the DPF and egr and gave it 48 more hp it now doesn't want to pull can hardly make 100 km per hour loaded … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,190 satisfied customers
Wayne spoke with you yesterday about this mack I am working
Wayne spoke with you yesterday about this mack I am working on when it gets hot it will not start- I installed the one way check valve in-line to inlet suction side of the filter head and that didn't … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 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
4,023 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
2,740 satisfied customers
08 Freightliner vin 8LY66999 losing prime starts w/starting
08 Freightliner vin 8LY66999 losing prime starts w/starting fluid … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
08 SDP Cat In a T660 KW, losing prime over night and seem to
08 SDP Cat In a T660 KW, losing prime over night and seem to have diesel in the oil, changed all 6 injectors and the fuel enable valve as well. Changed oil and filter ran truck for an hour and parked.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have an 08 4300 that acts like its not getting fuel when
I have an 08 4300 that acts like its not getting fuel when u start it let it set for a while it starts and runs just fine it's not losing prime do u have any ideas thankyou… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I am getting no voltage to the eups, I melted some
I am getting no voltage to the eups, I melted some wiring 8 month ago and a service tech rewired the front 3 cylinders. Been running fine since. I parked it for two days tried to start it, it acted li… read more
Diesel fumes
Diesel fumes
8 satisfied customers
I have a 1999 NPR. The truck was running fine, then all of
I have a 1999 NPR. The truck was running fine, then all of a sudden the truck started acting like it had no power and it was starving for fuel. Made it home. Tried to start the next morning and it wou… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

11,190 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

2,740 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

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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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