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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
Steven
Steven
Shop Foreman/Triage Tech
Associates
2,205 satisfied customers
I have a mp8 Mack with rough idle but runs good at full
I have a mp8 Mack with rough idle but runs good at full speed … read more
Steven
Steven
Shop Foreman/Triage Tech
Associates
2,205 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
Steven
Steven
Shop Foreman/Triage Tech
Associates
2,205 satisfied customers
Have 05 mack vision 427 engine i m loosing power dont have
Have 05 mack vision 427 engine i m loosing power dont have top end pulling power put new turbo on running atleast 30 lbs boost didnt fix it put new nozzles on 3 tested bad so didnt check other 3 just … read more
Steven
Steven
Shop Foreman/Triage Tech
Associates
2,205 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
Steven
Steven
Shop Foreman/Triage Tech
Associates
2,205 satisfied customers
1993 Mack e7 300 engine looses fuel prime to first filter
1993 Mack e7 300 engine looses fuel prime to first filter have replaced lift pump, spring was brke in old pump but still loosing fuel to first filter … read more
Steven
Steven
Shop Foreman/Triage Tech
Associates
2,205 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
Steven
Steven
Shop Foreman/Triage Tech
Associates
2,205 satisfied customers
HAVE A 2011 GXU 613 MACK MP8 ENGINE FUEL LEAK DOWN OVERNIGHT
HAVE A 2011 GXU 613 MACK MP8 ENGINE FUEL LEAK DOWN OVERNIGHT REPLACED FILTER BASE TRYING TO FIND OUT IF FUEL SHOULD COME OUT OF RETURN FUEL LINE WHILE PRIMING FILTERS THE PRIMER VALVE WAS LEAKING FUEL… read more
Steven
Steven
Shop Foreman/Triage Tech
Associates
2,205 satisfied customers
It's been sitting up and won't start. New fuel and filters
It's been sitting up and won't start. New fuel and filters but having a fuel problem … read more
Steven
Steven
Shop Foreman/Triage Tech
Associates
2,205 satisfied customers
2011 Mack MP8 lost power. Now it turns over good but kicks
2011 Mack MP8 lost power. Now it turns over good but kicks out before it starts … read more
Steven
Steven
Shop Foreman/Triage Tech
Associates
2,205 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
Steven
Steven
Shop Foreman/Triage Tech
Associates
2,205 satisfied customers
Im going up a a screeching sound from my engine my truck is
Im going up a hill a screeching sound from my engine my truck is a 2014 mack cxu613 mp8 engine has 500k … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
3,400 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
3,632 satisfied customers
Mack mp8 2012 in derate no codes no check engine light no
mack mp8 2012 in derate no codes no check engine light no lightening bolt, service def on information screen won't let us take out of derate… read more
Roy
Roy
shop foreman
Associate Degree
5,219 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
3,400 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
2,672 satisfied customers
Morning, Im looking for a Mack Tech. We are working on a 2008
Morning, I'm looking for a Mack Tech. We are working on a 2008 Mack truck with the MP8 engine. The nut backed off the idler gear, which we have replaced. wWe are 100% confident that the gear timing is… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
3,632 satisfied customers
Hi. I have a 2008 Mack truck with the MP8 engine. I have to
Hi. I have a 2008 Mack truck with the MP8 engine. I have to replace the intermediate idler gearset. My question is, how much stuff do I have to remove from the front side of the bellhousing? Starter, … read more
Toby
Toby
Vocational, Technical or Trade Scho
107 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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