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2014 Mack cxu613 vin ***************** hard to start
2014 Mack cxu613 vin ***************** hard to start replaced fuel pump, the pump started leaking externally replaced that pump and it also is leaking, truck still has to be hand primed to start… read more
Mike Mcmillan
Mike Mcmillan
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6,176 satisfied customers
Mack MP8 fuel primer pump is taking forever to prime, truck
Mack MP8 fuel primer pump is taking forever to prime, truck won't start, checked for double gaskets and for leaks. There is no leaks … read more
Mike Mcmillan
Mike Mcmillan
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6,176 satisfied customers
I have a p030600 code on my 2015 mack cxu613. Idle rough
I have a p030600 code on my 2015 mack cxu613. Idle rough when cold then go away is warm. No lose of power when up to temp. … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
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6,176 satisfied customers
I am working on a 2019 Mack mp8 engine truck will start with
I am working on a 2019 Mack mp8 engine truck will start with manual primer pump but will die shortly after does this engine use a electric fuel pump?… read more
Mike Mcmillan
Mike Mcmillan
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6,176 satisfied customers
I'm working on a 07 mack cxu613 mp8 has active coDes 128 84
I'm working on a 07 mack cxu613 mp8 has active coDes 128 84 fmi 9 & 5 also 144 84 9I've replaced road speed sensor at trans. Tailshft … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
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6,176 satisfied customers
Have a 2012 mack cxu613 mp8. Having trouble starting. Had
Have a 2012 mack cxu613 mp8. Having trouble starting. Had been priming filter by pushing the plunger on filter housing for 10-15 minutes it would eventually crank. Taken off line going to pressure rel… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
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6,176 satisfied customers
2012 mp8 cranks fine cold start hot low power code pdi 94
2012 mp8 cranks fine cold long start hot low power code pdi 94 fmi 7 … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
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6,176 satisfied customers
2012 Mack mp8, fuel filter base/housing has a manual pump to
2012 Mack mp8, fuel filter base/housing has a manual pump to fill filters manually, that manual pump will not stay in … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
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6,176 satisfied customers
I have a 12 cxu613 mp8 engine All of a sudden today started
I have a 12 cxu613 mp8 engine All of a sudden today started missing really bad and started running WArM . pulled over let cool off full of water, fan working, starts back, cant go 2 miles before temp … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
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6,176 satisfied customers
2009 Mack GU713 with a MP8-425M Hard start when sits
Second opinion] 2009 Mack GU713 with a MP8-425M Hard start when sits overnight cranks over then shuts off … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
I have a 2013 mack mp8 motor starts and runs fine for bout 5
i have a 2013 mack mp8 motor starts and runs fine for bout 5 miles then starts running out of fuel then dies i have a code 94 saying its fuel pressure sensor … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
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6,176 satisfied customers
When truck is pulling a heavy load at 1000 to 1200 rpm it
When truck is pulling a heavy load at 1000 to 1200 rpm it shakes and vibrates until it gets above 1400 rpm. … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
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6,176 satisfied customers
We put stainless injector cups with new injectors in a 2015
We put stainless injector cups with new injectors in a 2015 MP8 engine. We have all the trim codes programmed and it still will not crank. Turns over fine and the system is primed any help? … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,176 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
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6,176 satisfied customers
2012 mack with a mp8 runs fine until put under a load then
2012 mack with a mp8 runs fine until put under a load then dies restarts easily idles fine … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,176 satisfied customers
Where is the fuel transfer pump located on an MP8 425E Mack
Where is the fuel transfer pump located on an MP8 425E Mack engine ? … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,176 satisfied customers
Turns over no start can either will start the runs rough and
turns over no start can either will start the runs rough and has bad fuel knock can manual pump and will level out but if left idling will die and response is bad … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I'm looking at a 2012 CXU613. Has the MP8, Fuller RTL018918B,
I'm looking at a 2012 CXU613. Has the MP8, Fuller RTL018918B, and 3.58 rears. What problems do I need to know about the MP8 regarding reliability, fuel/oil consumption? Any valve train or after treatm… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,756 satisfied customers
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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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