Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
Mack rd 2000-If I run at 2000rpms truck loses power Ike not
Mack rd 2000-If I run at 2000rpms truck loses power Ike not getting fuel then shuts off even if I drive it an try to get in high hear … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
402 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
2000 Mack rd680s with e7. It loses prime by morning and
2000 Mack rd680s with e7. It loses prime by morning and won't start until primed. Where is the regulator located? … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
402 satisfied customers
Smoke when you step on fuel for 30seconds then clears up.
White smoke when you step on fuel for 30seconds then clears up … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,361 satisfied customers
I have a 2007 mack with the 380 engine i shut truck down for
Second opinion] i have a 2007 mack with the 380 engine i shut truck down for the day and next morning it wont start it wont hold prime i have new fuel pump new filters and we cant get prime pulling of… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,361 satisfied customers
On more level ground i cruise at 75 mph no problem and very
On more level ground i cruise at 75 mph no problem and very little white smoke. When climbing hills or mountain grades i lose speed and power booster guage wont go past 30 on dash. And my exhaust pump… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
C12 cat around 20 psi fuel pressure running rev up goes up
c12 cat around 20 psi fuel pressure running rev up goes up in smoke new fuel pump and primer housing… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
1980 6v92 losing primewhile runningand sitting. 6v92 losing
Fill filters and it will run but have to keep revs up and smokes white … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
Mack quantum the lad run it out of fuel .filled up but cant
Mack quantum the lad run it out of fuel .filled up but cant fire it … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 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 have a 2001 GMC C7500 with a Caterpillar 3126 engine. The
I have a 2001 GMC C7500 with a Caterpillar 3126 engine. The engine stalls going down the road and it sputters every so often with white smoke coming out of the exhaust. The truck runs fine while its i… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 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
I have a 1977 mack F 700 with a V8 in it that keeps loosing
I have a 1977 mack F 700 with a V8 in it that keeps loosing its prime after it sits for a few weeks. I have eliminated the complete fuel system down to the pump and still does it . is it possible that… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
99 series 60 factory reman 3 years ago at begining when started
99 series 60 factory reman 3 years ago at begining when started about every 30 to 40 times would start and blow white smoke sound like running on one cylinder clears up in less than 60 seconds runs fi… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
the problem I'm having with my cammies tell me that 14 is when
the problem I'm having with my cammies tell me that 14 is when I get up to 60 miles an hour the truck start jerking it seems like I'm losing power and fuel what could this be… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
2007 c7 330 hp runs fine however after sitting for 48 hours
2007 c7 330 hp runs fine, however, after sitting for 48 hours and i do a cold start it misses and blows white smoke for 10-15 secs. No codes, replaced fuel filters, installed FASS fuel system , replac… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 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
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
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

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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