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Related Medium and Heavy Trucks Questions
Have a 2011 mack with a mp7 engine when putting in 8th gear
have a 2011 mack with a mp7 engine when putting in 8th gear truck starts to derate slowly and drop speed ,have to shift back into 7th just to get power back and speed what do i need to check… read more
Joe Green
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2013 Mack gu713 Fault codes pulled using JPro 1127-18 647-5
2013 Mack gu713 Fault codes pulled using JPro 1127-18 647-5Driver reported that the unit runs well in lower gears, but the unit loses power once he gets into higher gears and the unit is going 60 mph … read more
Daniel Wilson
Daniel Wilson
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2013 mp 8 shudder or buck off and on. 2013 mack pinnacle mp8
not sure if fixing myself or taking to dealer... started with fuel filters they seem to have a lot of black / possible alge … read more
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About the tranny we chat about a few day ago. 2004 Isuzu FRR
hello Steve About the tranny we chat about a few day ago. 2004 Isuzu FRR with the allison transmission. Well, today took it to the dealer, waited 2 hours for them to tell me they can't fix it, because… read more
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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
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Mp7 starts and runs for few seconds. 07 ctp713 Mp7. Working
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Have 05 mack vision 427 engine i m loosing power dont have
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Mike Mcmillan
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I have a mack mru613 with an MP7, this unit has been having
I have a mack mru613 with an MP7, this unit has been having an issue with Aftertreatment fuel pressure 1 circuit/range performance. the customer has already replaced the sensor once. last time it was … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
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I have a 2007 mack ctp713 with a mp7 motor. The motor has
I have a 2007 mack ctp713 with a mp7 motor. The motor has been running rough for the past few months. it idles fine. we have had it at a shop and they changed the egr valve , and cleaned the egr. they… read more
Mike Mcmillan
Mike Mcmillan
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We have a 2009 Mack Granite GU813 with a MP7 engine. The
Hi there We have a 2009 Mack Granite GU813 with a MP7 engine. The truck initially had an egr valve fault code when we went out to it first. The truck has low power and had a DPF delete. The only activ… read more
Mike Mcmillan
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I have a Mack CL chassis with an ISX Cummins, T318 Mack 18
I have a Mack CL chassis with an ISX Cummins, T318 Mack 18 speed transmission. The tranny is jumping out of gear. History-the truck originally came in with the bell housing bolts loose which egg shape… read more
spankyjr1
spankyjr1
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Vocational, Technical or Trade Scho
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I have a 2007 Mack Granite with a MP7 engine. The model
I have a 2007 Mack Granite with a MP7 engine. The model number is ***** 713, ser# ***** The problem is fuel is mixing with the oil. What are all of the various scenarios that this could happen? I need… read more
Daniel Wilson
Daniel Wilson
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I am having intermediate throttle issues. Code 3513 pops up
Hello. I am having intermediate throttle issues. Code 3513 pops up when active. Comes and goes down the hwy. Usually when hitting hard bumps on the road.… read more
Daniel Wilson
Daniel Wilson
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I am having issues with a t2070 mack transmission, and low
I am having issues with a t2070 mack transmission, hi and low gear has air pressure on both sides, gear do not moves, I removed the side covers, I can manually move the sliding hi and low clutch insid… read more
spankyjr1
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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
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Associate Degree
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I have an 07 Columbia. I've notice low power in gears 8,9,10 when loaded and ring to
I have an 07 Columbia. I've notice low power in gears 8,9,10 when loaded and ring to get up to speed. Turbo doesn't whistle as hard as the whistle as hard in lower gears. It's notthrowing any codes. H… read more
spankyjr1
spankyjr1
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07 FORD F650 , CHECK trans light on and shift inhibit light
07 FORD F650 , CHECK trans light on and shift inhibit light on, intermitenly, changed speed sensor on back of tranny, checked tone wheel, not loose or wobbly, stuck a screw driver inside, checked wire… read more
John Vieira
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I have an International straight truck 07 with a DT 466. Truck
I have an International straight truck 07 with a DT 466. Truck will not start on an occasional basis. Have changed starter twice in past 4 months. There is power to the instrument cluster but the star… read more
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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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