Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
How does the injectors work on the new common rail system
How does the injectors work on the new common rail system for the MP8 Mack engine … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
442 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
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I have 1998 mack rb688s with a e7 350 engine losing power
i have 1998 mack rb688s with a e7 350 engine losing power going up a incline I just got the the headed and injectors done on it. It still smoke a lot tht color of the smoke is black … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
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
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Change all filters and oil checked turbo forslop un shaft
change all filters and oil checked turbo forslop un shaft excessive black smoke … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I need the specs for a mack cylinder balance test. What is
I need the specs for a mack cylinder balance test. What is normal % range for each cylinder... allowable tolerances etc can anyone get me this info?… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
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ENGINE MISS-FIRE !! 2004 F650 V.I.N. 4V665219 Catapillar C-7
ENGINE MISS-FIRE !!2004 F650 V.I.N. 4V665219 Catapillar C-7 Ascert Engine # KAL08810 ECM # 25636120IE Engine Hours 3952COMPLAINT: Truck came to our shop with an intermittent miss on engine. The longer… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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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
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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 hav a 07 cv713 mack with 400hp. I hav no power and it
I hav a 07 cv713 mack with 400hp. I hav no power and it strains so that it runs 210 heat … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 1991 mack truck with a mack pedigree motor beleave
I have a 1991 mack truck with a mack pedigree motor beleave its a 400. part# ***** 3514 and s/n # ***** the vin reads 12mp270c3mmo10947. … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,361 satisfied customers
I have a 99 mack the came into my shop missing on cylinder
I have a 99 mack the came into my shop missing on cylinder number 5 after it warms up replaced injector and unit on that cylinder and is still the same thing will miss after it gets hot check the volt… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,361 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
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1999 IH 4700 DT466E YH225743, Low power, runs good but feels
1999 IH 4700 DT466E YH225743, Low power, runs good but feels like it is pulling a heavy trailer. Won't go any faster than 60 mph @ 2750 rpm and it takes a while to get there. Builds 16 psi of boost an… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
210 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
Shop manager Trailer Refrigeration shop
138 satisfied customers
i have a 1995 mack dumptruck with the vin number 1M2P267C9VM029858
i have a 1995 mack dumptruck with the vin number 1M2P267C9VM029858 MODEL NUMBER RD588S the owner had fuel issues with it and yesterday it just stopped working the injection pump voltage is looking lik… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have 2 Mack trucks model ch635 powered by 330/350 hp Mack
I have 2 Mack trucks model ch635 powered by 330/350 hp Mack engines. 2004 year model. These trucks suffer from lack of HP.What can we do to increase HP? Also can we by pass the egr cooler? Thanks for … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Can I install a mechanical injection pump from a 96 Mack e-7
Can I install a mechanical injection pump from a 96 Mack e-7 350 on a 96 e-7 350 electronic motor… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
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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

Journeyman

4,023 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

4,361 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

Mechanic

1,700 satisfied customers

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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