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Related Medium and Heavy Trucks Questions
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
403 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
403 satisfied customers
Have 05 mack vision 427 engine i m loosing power dont have
Have 05 mack vision 427 engine i m loosing power dont have top end pulling power put new turbo on running atleast 30 lbs boost didnt fix it put new nozzles on 3 tested bad so didnt check other 3 just … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
403 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
403 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
403 satisfied customers
Don't have a power. Mack RD688S ,1998 and E7 engine. I am
Yes I am fixing it myself I change all the fuel filters I change the air filter and check all the fuses and didn't change anything … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
403 satisfied customers
When adjusting the valves on a e7 460 mack. i rolled it
when adjusting the valves on a e7 460 mack. i rolled it around to 1 and 6 on fly wheel do you adjust both valves at this time. problem i am having is intake valves are still half open… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
14,730 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
14,730 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 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
7,469 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
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Working on a 3406B CAT today. ESN is 7XC12055. Customer
Working on a 3406B CAT today. ESN is 7XC12055. Customer concern is excessive smoke and missing. With the temp gun found #1 & #2 holes cold. Cracked the fuel lines off of the pump with no change. Pulle… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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We got a 2003 mack ch613 that tje dealer just put a new
We got a 2003 mack ch613 that tje dealer just put a new turbo on and it wont build over 22 psi of boost has no loos or busted hoses or pipes that we can tell been over it with soap and water thanx in … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
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How do I test my compressor on my Mack e7 427 to see if
How do I test my compressor on my Mack e7 427 to see if it's bad. My egr cooler was bad but I'm still puking water out of the reservoir after replacing it and the filter. Or is there anything else tha… 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
14,730 satisfied customers
Possible problem with a mack(###) ###-####motor It has used about
Possible problem with a mack(###) ###-####motor It has used about a gallon of oil a day for past 3 years. It now misses. It is the #3 cyc. from cracking the lines to see which cyc it is and it leakl f… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
1995 mack ch613 E350. Last fall the customer stated that the
1995 mack ch613 E350. Last fall the customer stated that the truck would miss a little at start up and idle, but would run fine other than that. They haul local grain. They took it to the mack dealer … read more
Jim
Jim
Diesel tech.
212 satisfied customers
I am getting no voltage to the eups, I melted some
I am getting no voltage to the eups, I melted some wiring 8 month ago and a service tech rewired the front 3 cylinders. Been running fine since. I parked it for two days tried to start it, it acted li… read more
Diesel fumes
Diesel fumes
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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

14,730 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

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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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