Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
Under a load from 1200rpm to 1500rpm my 12.7L spits and
Under a load from 1200rpm to 1500rpm my 12.7L spits and sputters. I just replaced the EGR Valve and Cooler. But it still spits and sputters … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
398 satisfied customers
My ASV sr 80 doesn't go above 1700-1800 rpm; problem started
my ASV sr 80 doesn't go above 1700-1800 rpm; problem started all of a sudden. Changed transfer pump and bled the pump. Once reaching 1700 - 1800 the engine rpm will die down to around 1600. Also notic… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
2006 Freightliner Columbia LV63935. Detroit Diesel 14.0 2006
Detroit Diesel 14.0 2006 Columbia VIN:LV63935. Driving normal today, all of a sudden, lost all power. no turbo spool, and seemed to be missing. odd thing is it Idles pretty smooth. Turbo actuator moves up with 90psi. I pulled EGR exhaust tube off, no antifreeze there. I pulled turbo to CAC hose off, no oil there. Fuel pressure is 18psi at idle. Lots of white smoke when i try to rev in netruel. … read more
Expert
Expert
7,453 satisfied customers
We have a ddec 6 at the shop having problems with. At high
Hi. We have a ddec 6 at the shop having problems with. At high idle. About 800 - 900 rpm the truck has a miss. Doesnt do it until truck has run for about 5 minutes and warms up. If you put it under lo… read more
timdieseltech
timdieseltech
lead diesel tech, shop owner
Vocational, Technical or Trade School
192 satisfied customers
I have a customer's truck in the shop ( Freightliner) with a
I have a customer's truck in the shop ( Freightliner) with a Detroit that he wants Jake Brakes added on. I have order all the hard parts and wiring switch etc. From a sister trucks Vin number V84827. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,373 satisfied customers
I have a c13 ran perfect on the way from Miss. to Ga and 5
I have a c13 ran perfect on the way from Miss. to Ga and 5 miles from home stopped at the store. Pulled back on the road and truck would barely run and was smoking black out the exhaust like a tire on… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have an 06 western star with a 14 litre Detroit...low
i have an 06 western star with a 14 litre Detroit...low power on any level..ive changed the cac,fresh service,replaced delta p sensor and the turbo is a year old..its been hooked up at Detroit and all… read more
Expert
Expert
7,453 satisfied customers
Have a Freightliner Columbia 120 detroit 60 series 14 ltr.
Have a Freightliner Columbia 120 detroit 60 series 14 ltr. after heavy rain truck cut off (report from driver). later dash board error FN 43 flashing (checked means coolant low). after topping coolant… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,373 satisfied customers
Could you tell me when performing a cylinder cut out test on
Hi there could you tell me when performing a cylinder cut out test on a mbe 4000 what should it read in ft pounds i have readings that vary from 10lbs to 50lbs . the truck has piss poor fuel ecomomy a… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I have a 2004 Freightliner Columbia with a 14 ltr series 60.
I have a 2004 Freightliner Columbia with a 14 ltr series 60. when I pull off after a complete stop it blows BLACK smoke. like too muck fuel. If I come off the fuel and then get back on it the smoke st… read more
FIX-IT
FIX-IT
Comercial transport technician
Vocational, Technical or Trade Scho
829 satisfied customers
DIESEL MECHANIC 14.0 L , HESITATION AND LOSS OF POWER
HESITATION AND LOSS OF POWER WHILE RUNNING ON THE HIGHWAY , IT HAPPEN ALL OF A SUDDEN THEN I RELEASE FUEL AND FUEL AGAIN IT FEELS LIKE NO FUEL PEDAL WORKING, BUT SOME TIMES IT DOES GO BACK AND WORK, WHEN I DRIVE AND LETS SAY I AM USING THE CRUISE CONTROL IT START LOSS POWER/ PICK UP POWER ON THE ROW AND SHAKING, I DID CHANGE TURBO, EGR SO FAR DONT KNOW WHAT TO DO , OH YEAH WHEN IT CHOKES ON THE HIGHWAY THE ENGINE LIGHT COMES ON, BUT WHEN LET GO OFF THE FUEL THE LIGHT GOES OFF, WHEN FUEL AGAIN IT COMES ON, AND SO ON, BUT AFTER A LITTLE WHILE ILL BE ABLE TO PICKUP SPEED AND GO, ITS BAD ON INCLINES START DIE FAST , … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
2010 Kenworth, ISX 15, CM871. Seems as though it's stuck in
2010 Kenworth, ISX 15, CM871. Seems as though it's stuck in REGEN, for about 6 continuous hours of operation it was de-rated with bluish gray smoke coming from exhaust on steep hill climbs with a heav… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
2008 freightliner day cab truck, with Detroit 60, I
2008 freightliner day cab truck, with Detroit 60, I understand that is certain measurement and calibration to do after installing a turbo waste gate actuator valve. Do you have the spec's or literatur… read more
Expert
Expert
7,453 satisfied customers
I have A DDEC VI bridge motor if you will call it that 60 series style block, head valve
I have A DDEC VI bridge motor if you will call it that 60 series style block, head valve covers but has all emmisions turbo intake system of the dd15 liners, piston connecting rod com out as assembly … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
hi i have a 2006 freightliner century with the series 60 detroit
hi i have a 2006 freightliner century with the series 60 detroit engine and it coughs and sputters and bulks and shoot out puffs of black smoke until it gets up over speed 60 and im getting poor fuel … read more
Don
Don
fleet superintendent
Vocational, Technical or Trade Scho
1,636 satisfied customers
Have 07 Freightliner century. Dd 60 14 ltr. 750,000 has been
Have 07 Freightliner century. Dd 60 14 ltr. 750,000 has been running excellent but coolant level sensor went bad, unplugged it, drove about 1400 miles. Take off with back haul, damn seems way heavy . … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,373 satisfied customers
I have a 2006 Freightliner with a 14 ltr Detroit 450hp. Upon
I have a 2006 Freightliner with a 14 ltr Detroit 450hp. Upon acceleration i am getting a miss with black smoke coming out the exhaust pipe. Cruising it is fine, as soon as you ask for power is starts … read more
Clayton
Clayton
Technician
Vocational, Technical or Trade Scho
627 satisfied customers
I have a question about a 2006 freightliner with a 14L detriot.
I have a question about a 2006 freightliner with a 14L detriot. Truck is acting like it is back firing through the exhaust. When I upshift it sounds like the turbo slows down, I lose power for a secon… read more
Jim
Jim
Diesel tech.
212 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

11,373 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

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I am ASE Master Truck Certified.

Wayne

Wayne

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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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