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Related Medium and Heavy Trucks Questions
How do you get the air out of the fuel injectors of a Mack
How do you get the air out of the fuel injectors of a Mack e7 … read more
Chris (aka-Moose)
Chris (aka-Moose)
Technician
Vocational, Technical or Trade School
353 satisfied customers
Number one cylinder missing put new injector pump and
number one cylinder missing put new injector pump and injector in still missing on one its a 1998 mack 400 hp … read more
james Roberts
james Roberts
Maintenance assistant
Vocational, Technical or Trade School
3 satisfied customers
Replaced exhaust manifold gasket, truck ran fine for a
replaced exhaust manifold gasket, truck ran fine for a couple of minutes, then it got a terrible miss in it, raw fuel, upon shutting it off, all sorts of pre ignition, also while running, tried to ble… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
14,853 satisfied customers
I have 2003 Mack Mr truck and truck missing randomly. I have
I have 2003 Mack Mr truck and truck missing randomly … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
415 satisfied customers
I've got a 2006 Cxn Mack. Crank but won't start. Fuel is
I've got a 2006 Cxn Mack. Crank but won't start. Fuel is present … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
415 satisfied customers
Cylinder 4 is missing. Replaced injector and unit pump. If
Cylinder 4 is missing. Replaced injector and unit pump. If you crack line at unit pump it's just a flow of fuel not a squirt like other cylinders … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
415 satisfied customers
Mack e7 sputters/ misses when you let it idle than take off.
mack e7 sputters/ misses when you let it idle than take off. it clears out normally by the first shift or two and runs out normal … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Mack Engine E7-400 last drove ran great,start up following
Mack Engine E7-400 last drove ran great,start up following day, running but very bad attempted to check firing of injectors individually front of engine to rear - loosen first injector no fuel at inje… read more
Jim
Jim
Diesel tech.
212 satisfied customers
My name is ***** ***** , I have a 2000 Mack CH613 with
I have a 2000 Mack CH613 with E7 engine and had #4 eiu was faulty replaced with new one. updated code in the ecm and now #1 and 2 missing have check and the fuel just poor out when line cracked loose and all other pulse when running, swapped out unit pump with #3 and #2 still missing on #1 and #2 stayed the same any thought? … read more
diesel-tech
diesel-tech
Owner of landrys truck repair llc
136 satisfied customers
I am working on a mack ch613, it has an E7 engine. engine
I am working on a mack ch613, it has an E7 engine. engine has a miss. I cracked the injector lines at the electric solenoids and #1 and #3 make no difference. I was thinking of swapping two of the sol… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
14,853 satisfied customers
I AM WORKING ON A 2006 MACK CV-713 WITH A 427 ASET,
HELLO, I AM WORKING ON A 2006 MACK CV-713 WITH A 427 ASET, IT HAS AN ENGINE MISS ON CYL. #5. SENT ALL THE INJECTORS OUT AND 4 ARE BAD SO I INSTALLED 6 REMACK INJECTORS AND 6 NEW LINES, MISS ON CYL. #5… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
2000 mack cl 713 etech 427 engine. engine misses after rolling
2000 mack cl 713 etech 427 engine. engine misses after rolling and/or idles for a while. does not happen in cold weather does it after 45-50 degrees outside. all uni pumps tested and are ok. transfer … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 93 Mack Gravel truck with the E7-400 Engine in it.
I have a '93 Mack Gravel truck with the E7-400 Engine in it. I bought it not running with the dash taken apart. The previous owner past before he could get it running. I towed it home and began the se… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
Is there someone who could help me out with the valve adjustment
Is there someone who could help me out with the valve adjustment procedures for a 1999 Mack, E7-300?… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
14,853 satisfied customers
Have a460 mack was spitting and cracking in exhaust put new
Have a460 mack was spitting and cracking in exhaust put new head on had injectors tested now it is slow to open up and has feul showing where exhaust goes together. And the smell of raw feul also low … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
we are working on a 1991 mack with an e6 4 valve motor in it.
we are working on a 1991 mack with an e6 4 valve motor in it. the engine has the front cover pointer and markings on the damper pulley. we adjusted all of the valves and they are fine, but when we kee… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
04 Mack Granite CH713: Mack CH713 skipping , crack each injector
Mack CH713 skipping , crack each injector changes tone on all but #3 steady stream of fuel on 3 pulses on other 5 , replaced unit injector same issue… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
14,853 satisfied customers
I need to push eng. coolant back to a trailer for intransit
I need to push eng. coolant back to a trailer for intransit heat. What is the location of the best coolant pres. port and the best port to return the coolant to on the Mack E7 eng? This is in a 07 Mac… read more
diesel-tech
diesel-tech
Owner of landrys truck repair llc
136 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

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I am ASE Master Truck Certified.

Wayne

Wayne

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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

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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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