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Related Medium and Heavy Trucks Questions
I have a 2001 mack ch 613 the gear on the accessory drive
i have a 2001 mack ch 613 the gear on the accessory drive for the oil pump has moved over causing oil preasure loss. is there a set screw holding it in place.if not how do i repair … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
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
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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
15,197 satisfied customers
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
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I have a 1999 ch13 with E7 427 replaced cyl heads new
I have a 1999 ch13 with E7 427 replaced cyl heads new injectors and pumps contuning to have heavy black smoke at snapthrottel clears up some at high rpm pressur tested air charge holds 20 psi with no … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 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
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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
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430 satisfied customers
I have a 03 Mack E7 427 engine it runs hot with thermostats
I have a 03 Mack E7 427 engine it runs hot with thermostats in you can take them out and it does not get above 160 degrees empty soon as you put thermostats back in it starts running hot what could be… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
15,197 satisfied customers
Where is the fuel return shut off on an E7 98 model Mack. It
Where is the fuel return shut off on an E7 98 model Mack. It won't keep a prime. … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 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
I got a 1997 mack with a e7 will not start with out either
Hi I got a 1997 mack with a e7 will not start with out either got good fuel psi to injection pump just not out till you hit it with either then it will pump out injection pump an start. thanx… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
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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
GA-RP mack e7-350 2000 year model replaced fuel injection pumps (6) no
mack e7-350 2000 year model replaced fuel injection pumps (6) now have fuel in crankcase (3) pumps were bad… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
15,197 satisfied customers
I am changing injection pump on 1995 mack E7 454 engine how
I am changing injection pump on 1995 mack E7 454 engine how do I time injection pump before removal .… read more
tkman55
tkman55
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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
I have a 1997 mack truck it has a e7-350 engine it starts fine
I have a 1997 mack truck it has a e7-350 engine it starts fine after a short time a yellow light comes on malfunction electronic comes on low idle runs good when I speed up it starts to miss and smoke… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
15,197 satisfied customers
Hello, I have been reading your answers, and I am happy with
Hello, I have been reading your answers, and I am happy with your correspondence with customers. I have a 93 Mack E7 Mechanical engine that developed low oil pressure shortly after replacing a cylinde… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
15,197 satisfied customers
I have a 2000 mack ch 613 E7-460. Motor shut down without
I have a 2000 mack ch 613 E7-460. Motor shut down without showing engine shutdown light coming on. or showing any engine codes. We been trying to get it restarted by FRIST checking if we have fuel 2nd… read more
diesel-tech
diesel-tech
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136 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

5,234 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

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15,197 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,740 satisfied customers

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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All types of Cummins applications

Curtis B.

Curtis B.

Technician

1,571 satisfied customers

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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