Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have 2003 Mack E7. Injectoer solenoid bad. Bought new
I have 2003 Mack E7. Injectoer solenoid bad. Bought new injector pump with solenoid. Whats the del about timing it ? … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
396 satisfied customers
Im trying to find a trouble shooting code for Rack Position
Im trying to find a trouble shooting code for Rack Position Sensor -Voltage above normal or shorted to high SID 24, FMI 3 … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
396 satisfied customers
My big cam 4 is overheating and I am wondering how the
my big cam 4 is overheating and I am wondering how the thermostats are supposed to work … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
My Dad has a 00 Mack Ch E7 it keeps derating and keeps
My Dad has a 00 Mack Ch E7 it keeps derating and keeps showing multiple codes have replaced several sensors but hasn't helped it runs fine sometimes … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 03 ch613 Mack with a 427 that I need help with.
I have a 03 ch613 Mack with a 427 that I need help with … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
396 satisfied customers
I have a 2007 Mack CHN 613 with a 427 E7 engine and the
I have a 2007 Mack CHN 613 with a 427 E7 engine and the engine temp is running next to red line under a load, when at rest the temp lowers to normal. The water temperature appears to be running a litt… read more
Bradey V
Bradey V
Certificate
Have a Mack e7 427. The fan clutch is locked in and we were
Have a Mack e7 427. The fan clutch is locked in and we were diagnosing it. checked solenoid fine. Went to eck … read more
Keiphun Sowell
Keiphun Sowell
AutoDiesel Technology
1,068 satisfied customers
It runs out of fuel idling. Mack chn613 427. Replace all
Replace all fuel lines bypassed eco and primary fuel filter … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
396 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
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
396 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
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
396 satisfied customers
Mack e7 460 blowing antifreeze back thru reservoir tank cap
Mack e7 460 blowing antifreeze back thru reservoir tank cap new thermostat new top reservoir tank and cap. Engine was overhauled a year ago been doing it since we bought the truck shortly after the ov… read more
Expert
Expert
7,453 satisfied customers
My 2005 cv713 Mack roll-off with 427 Mack overheats on hot
my 2005 cv713 Mack roll-off with 427 Mack overheats on hot humid days clutch fan seems does it sound like radiator should be head gasket was done approximately 5000 miles ago not losing any fluid but … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a E7 427 mack with elec fuel pedale, it run rough and
i have a E7 427 mack with elec fuel pedale, it run rough and smoke white and blue , injector seem fine advance timming selenoide had a broken Oring … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Does the static timing change on mack e7? I took a semi electronic
Does the static timing change on mack e7? I took a semi electronic e7 454 and put a manual pump on the motor set timing at 8 degrees installed fuel pump with timing Mark in the center of the window on… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I'm having issues with my turbo not always spoiling on
Dan I'm having issues with my turbo not always spoiling on my Mack and I'm leaning towards the egr sticking since i have recently changed the cooler I don't think that is the problem as I have read on… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Working on a mack (mtg date 02/1999). engine is an e7 427.
working on a mack (mtg date 02/1999). engine is an e7 427. had a miss on #1 and #3 cylinder. Confirmed this by loosening the injector lines at the electric solenoids. I installed 2 reman injectors. #1… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
14,675 satisfied customers
we have a Mack E7 460 that has a bad cam and roller do
hello we have a Mack E7 460 that has a bad cam and roller do I have to pull head I know the lifters comes out the bottom but I have read something about a h clip that is up top that you have to pull t… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
How do you change bosch fuel injection pump on mack e7 427
How do you change bosch fuel injection pump on mack e7 427 . One of mine is leaking but still runs good. Paul… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
14,675 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

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I am ASE Master Truck Certified.

Wayne

Wayne

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14,675 satisfied customers

worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

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ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

cumminsdr

cumminsdr

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Curtis B.

Curtis B.

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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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