Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
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
2000 CH 613 / E7 WITH 6 UNIT PUMPS. ONLY BARELY RUNS ON
2000 CH 613 / E7 WITH 6 UNIT PUMPS . ONLY BARELY RUNS ON STARTING FLUID … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 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
Have a 2000 mack rd688s.Driver said it was using 2 gallons
Have a 2000 mack rd688s.Driver said it was using 2 gallons engine oil a day. He also said it was blowing a heavy stream of white smoke, especially when jake brake was on. When i test drove it i for th… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
402 satisfied customers
I've got a 6 4 flash code have checked resistance from abs h
I've got a 6 4 flash code have checked resistance from abs h and L circuit have 60 ohms. Tried used ecu and vecu no luck. Truck still only idles 900 rpm and will go into coolant shutdown before 150 de… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
X. 2003 mack RD688s e7 etech 350 engine. Will not start, it
2003 mack RD688s e7 etech 350 engine. Will not start, it only cranks. I have eliminated any problem from the fuel tanks. I have a line running from a separate fuel container. I've replaced the Crank sensor and the Engine speed sensor. still no luck … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
402 satisfied customers
1993 mack truck ch-613 with a 400 hp .timing go to [email protected] full
1993 mack truck ch-613 with a 400 hp .timing go to [email protected] full load and i being told it needs to be 16… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
I'm working on a om 460 la and and have a problem. Lets
Hi, I'm working on a om 460 la and and have a problem. Lets start with ecu 128 sid 001 fail 12. Injector #1 failure at idle. Idle rough with engine light on, rev up and light goes out but still missin… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 1996 mack ch613 with a e7, I went to a fuel station
i have a 1996 mack ch613 with a e7, I went to a fuel station to fuel up and when I went to turn it on it wouldn't start. it cranks but wont start and when I plug in the scan tool it wont communicate a… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
We put a new long block on a 2004 AC Mack and now engine
We put a new long block on a 2004 AC Mack and now engine starts and runs fine for 30 sec but then dies. Restarts fine but same kill happens every time. Mack dealer tech came and with his laptop said n… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
10 : 1999 mack e7 460 turned on side towed to shop no damage
1999 mack e7 460 turned on side towed to shop no damage but wont start run on either only … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
We have a 1993 Mack CH613 that dies going down the road with
We have a 1993 Mack CH613 that dies going down the road with no warning. If were still moving we can shut the ignition switch off then back to the run positioned, it will then restart and continue on … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 2000 Mack CL713 with an E7 460. It has a chirp
Hi I have a 2000 Mack CL713 with an E7 460. It has a chirp sound, our mechanics have taken of the valve cover and when pressure is applied to the number 4 rocker the sound goes away, we are not pushin… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 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
98 mack ch613 with a Mack E7. Truck won't get out of its own
98 mack ch613 with a Mack E7. Truck won't get out of its own way when on the highway. Hooked up to it and its not showing boost pressure. Can't find the boost pressure sensor. the only active code I h… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
HI I HAVE A 2005 INTERNATIONAL 4300 WITH DT466.WONT START ON
HI I HAVE A 2005 INTERNATIONAL 4300 WITH DT466.WONT START ON IT OWN.BUT WILL WITH EITHER,WILL IDLE,BUT WHEN YOU GO TO DRIVE IT WILL STALL IN LESS YOU GIVE IT SOME FUEL.WHEN IT SHUT OFF.YOU CO ULD TRY … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
2001 mack e7 cx613 trouble code flashes, j1939 link affecting
2001 mack e7 cx613 trouble code 69 flashes, j1939 link affecting operation of other device. pulled code because when the truck is at operating temp. and reved up to approx 1800 rpm, it will suddely mi… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 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
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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

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

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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