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Freightliner century with detroit 12.7 loosing power going
freightliner century with detroit 12.7 loosing power going up hills and acceleration lagging changed TPS the Turbo boost sensor all oil lines and nothing while driving one time started with small misf… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
418 satisfied customers
I have 2003 freightliner colombia with detroit 12.7,,
i have 2003 freightliner colombia with detroit 12.7,, loosing fuel pressure ,,change fuel pump and fuel check valve also ran direct diesel tank line to the pump and still loosing pressure ... when you… read more
BrentR718
BrentR718
6 satisfied customers
Freightliner century with detroit 12.7 loosing power going
freightliner century with detroit 12.7 loosing power going up hills and acceleration lagging changed TPS the Turbo boost sensor all oil lines and nothing while driving one time started with small misf… read more
Roy Belding
Roy Belding
7,528 satisfied customers
I have 2003 freightliner colombia with detroit 12.7,,
i have 2003 freightliner colombia with detroit 12.7,, loosing fuel pressure ,,change fuel pump and check valve also ran direct diesel tank line to the pump and still loosing pressure ... when you hit … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
1997 freightliner classic with detroit 12.7. When driving
1997 freightliner classic with detroit 12.7. When driving after i reach 70mph and rpm is at 1700 and set my cruise control the rpm gauge only keeps creeping up. Not the engine or the speed just the ga… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
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
418 satisfied customers
I have 2006 freightliner century with Detroit 60 12.7 truck
I have 2006 freightliner century with Detroit 60 12.7 truck was running good until 2 days ago, suddenly while I was cruising at 60 mph its start to sputter / jerk fells exactly like cars with distribu… read more
Roy Belding
Roy Belding
7,528 satisfied customers
I have a 2011 Freightliner Columbia series 60 12.7 DET
I have a 2011 Freightliner Columbia series 60 12.7 DET engine cranks does not start it gives me a no eng and a fault 01 on the LCD screen where it show odometer reading I get no volt reading the only … read more
Bradey V
Bradey V
Certificate
I have a Freightliner with a DD that is making a tinny
I have a Freightliner with a DD that is making a tinny tapping noise that starts at 950 rpm. … read more
Roy Belding
Roy Belding
7,528 satisfied customers
I have a 99 12.7 Detroit that is missing and fluttering at
I have a 99 12.7 Detroit that is missing and fluttering at low rpm and blowing white smoke. I have replaced all injectors, injector harness, fuel pump, sensor harness, harness from cab to computer, ca… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
418 satisfied customers
1997 Freightliner classic with Detroit 12.7 I have smoke out
1997 Freightliner classic with Detroit 12.7 I have white smoke out the exhaust. When I cut out injector 2 the smoke goes away. Can anyone one tell me what to look into? I recently did an over head cou… read more
Roy Belding
Roy Belding
7,528 satisfied customers
I have a 1995 Freightliner FLD with series 60 Detroit. It
Hello there. I have a 1995 Freightliner FLD with series 60 Detroit. It has 482000 miles on the rebuild. The problem I'm having is this, the #1 injector cup seems to keep failing. Last Novemer, 2015 th… read more
Roy Belding
Roy Belding
7,528 satisfied customers
Buddy, I have a 2007 Columbia X35320, with a 14 liter 475 hp
Hi buddy, I have a 2007 Columbia X35320, with a 14 liter 475 hp series 60. The problem I'm having has cost a lot of money and know one seems to be able to figure it out. Loaded or empty on any kind gr… read more
Roy Belding
Roy Belding
7,528 satisfied customers
​ I need an answer from an experienced Detroit Diesel
​Hello, I need an answer from an experienced Detroit Diesel mechanic. I have a 1994 Volvo GMC with a Detroit Diesel 12​.7​ liter engine DDEC III. Engine has 350,000 miles (fuel injectors are rebuilt) … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
, I have an 01' freightliner series 60 Detroit 12.7. I
Hello, I have an 01' freightliner series 60 Detroit 12.7. I have many run ability issues but the newest one is, when I'm parked at high idle, after an hour or so the truck will drop to low idle! Howev… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
Hello, I have a Freightliner Argosy prime mover year 2000 with
Hello, I have a Freightliner Argosy prime mover year 2000 with a 12.7 liter 500hp Detroit engine. When I'm loaded and under heavy acceleration it makes an air chooffing noise at a rate of about one ch… read more
FIX-IT
FIX-IT
Comercial transport technician
Vocational, Technical or Trade Scho
829 satisfied customers
have a 1999 12.7 Detroit; intermintent no start. cranks but
have a 1999 12.7 Detroit; intermintent no start. cranks but no fire. changed crank sensor, fuel filter, check valve, fuel pump, jumped past ing. switch. will start with small shot ether. runs fine onc… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
my 2006 freightliner century st, detroit motor, uses a gallon
my 2006 freightliner century st, detroit motor, uses a gallon of coolant about every 600 miles. I just had new fuel injectors and injector cups put in last week. Is this serious, will it create a prob… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

11,541 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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