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I have a 2014 Mac CXU with a MP8 The VIN number is
Good morning I have a 2014 Mac CXU with a MP8 The VIN number is ***** I'm getting a couple of active trouble codes SPN 3251 FMI4 and p245 4 00 FMINA also a active brakes open or short shorted load sen… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
4,280 satisfied customers
I have a 2012 mack with a mp8 engine. Getting codes mid128
I have a 2012 mack with a mp8 engine. Getting codes mid128 spn1127 fmi14 and spn94 fmi18 . Truck starts and idles perfectly. The vibration starts when loaded and accelerating when engine reaches 50mph… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
4,280 satisfied customers
MACK MP8 CODE MID128 LACKING POWER. MACK 2010 MP8. NOTHING
MACK MP8 CODE MID128 LACKING POWER JA: What's the make/model/year of your truck? Engine type? Customer: MACK 2010 MP8 JA: Are you fixing your truck yourself? What have you tried so far? Customer: NOTH… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
4,280 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
4,280 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
4,280 satisfied customers
Just wondering how often to adjust valves on MP8. Mack
Hi just wondering how often to adjust valves on MP8 … read more
Roy Belding
Roy Belding
7,580 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
4,280 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
4,280 satisfied customers
I HAVE A 2009 MACK CXU WITH MP8. GOING DOWN INTERSTATE IT
I HAVE A 2009 MACK CXU WITH MP8. GOING DOWN INTERSTATE IT WILL LOSE POWER AND BOOST THEN PICK BACK UP … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
2007 mack with an MP8 engine.The customer brought it to me
2007 mack with an MP8 engine.The customer brought it to me after spending over 20,000 at a mack dealer and having a delete done hoping it would fix his low power.i am not a Mack expert so it is a scho… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
4,280 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
4,737 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
4,737 satisfied customers
I have an mp8 changed the egr cleaned the egr cooler and
i have an mp8 changed the egr cleaned the egr cooler and still have a pid 411 fmi 05,pid 503 fmi 04,pid 258 fmi 00, pid 506 fmi 04, pid 108 fmi 08 … read more
Doug Barnowski
Doug Barnowski
HD truck tech
14 satisfied customers
Toby, my name is***** recently bought a 93 Peterbilt with
Hi Toby, my name is***** recently bought a 93 Peterbilt with 12.7 DDEC4 430/470 engine. Drove the truck about 7hrs to my home and noticed consistent low power and low turbo boost. No smoke, No CEL. I … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a boost problem drivine on flat road it fine comes
I have a boost problem drivine on flat road it fine comes to a little hill it dies change turboe egr etc still nothing even the mack up grades . frustating … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 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
4,737 satisfied customers
96 volvo with cat 3406E died. No fuel flow thru ecm. Would
96 volvo with cat 3406E died. No fuel flow thru ecm. Would only turn over with either spray. Used shop peterbiult ecm ran in shop ok. Then grabbed and ecm from blown motor 98 Volvo with 3406E and swap… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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10/1/2009 ford f750 6.7 cummins ISB L6Engine stalls at random
10/1/2009 ford f750 6.7 cummins ISB L6 Engine stalls at random under load, service engine light comes on then the engine dies out Restart and engine runs with no service engine light Non active code e… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
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Daniel Wilson

Daniel Wilson

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Curtis B.

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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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