Medium and Heavy Trucks

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J just bought a used 07 kenworth t600 with a c15 cat.. the
Hello j just bought a used 07 kenworth t600 with a c15 cat.. the truck ran great when i went to pick it up empty. I hooked up the trailer and the abs light came on and I could not go over 1500 rpm and… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
I have t600 with acert engine. During a hard pull especially
I have t600 with acert engine. During a hard pull especially under heavy loads or cold days, it will stumble or puff for 2 or 3 seconds and then it's okay. This random, it doesn't do all the times. It… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
2006 c8500 gmc cat c7 wax won't past 1000 rpm under load.
2006 c8500 gmc cat c7 wax won't past 1000 rpm under load. Fuel pressure 70-100 psi iap 3800psi… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
Dr. Cummins Have a ISM 35133134 that has oil or diesel
Dr. Cummins Have a ISM 35133134 that has oil or diesel coming out of all 6 exhaust ports. has enough coming out that is has it blown out past the turbo outlet.. ( originally removed turbo to replace s… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
Just installed new cylinder head on 2010 isx starts and
just installed new cylinder head on 2010 isx starts and idles fine drive under load or just crack throttle and it has excessive black smoke it was running perfect before repair ive doulble checked tim… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a Kenworth t600 that is a 99 and it is running rough
I have a Kenworth t600 that is a 99 and it is running rough I have changed the fuel filter air filter and clean fuel lines with air pressure but it seems to be missing what could I check to make sure … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I have a 2002 Freightliner Columbia with the Detroit 60
hi, I have a 2002 Freightliner Columbia with the Detroit 60 series im on my 3rd turbo in 2 weeks.. about 1000 miles. turbo is leaking oil and blowing oil threw the exhaust… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
Hallo Cat man, We have some problems with a C9 engine. It
Hallo Cat man, We have some problems with a C9 engine. It runs perfectly when no load but not when putting some load ( a turbine ) when engine is at 1800 RPM. The RPM drops a lot when under load. When… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
I have a 2001 Kw with c15 475 cat with a loss of power. No
I have a 2001 Kw with c15 475 cat with a loss of power. No check engine light, no obvious noises for a missing cylinder. Idles and runs perfectly just a loss in overall power and acceleration. No fuel… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
Have an 2006 4400 IH With DT466 Puffs a little white smoke
Have an 2006 4400 IH With DT466 Puffs a little white smoke at start up and looses 1/2 gallon of coolant daily. Engine runs great and has good power. Where should I look for this problem? EGR cooler or… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
my 99 international looses power and powers out totally and
my 99 international looses power and powers out totally and has to stop going up a short steep hill.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
Kenworth T600, Caterpillar C15 engine, turbos are surging,
Kenworth T600, Caterpillar C15 engine, turbos are surging, turbos whine heard and turbos accelerating and decelerating but engine speed stays relatively constant… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
07 International 9400I C15 ser# XXXXX like NXS 12757 not sure
07 International 9400I C15 ser# XXXXX like NXS 12757 not sure of first letter, roughed up. Bought two months ago have put seven thousand miles on it, runs good but has no power on hills. After hard pu… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
we have 2006 freightliner business class M2 with C9 caterpillar
we have 2006 freightliner business class M2 with C9 caterpillar motor. Once it warms up (over 150 degrees) starts to blow heavy white/grey smoke. Worse under load and higher RPM's. No check engine lig… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
I have a 2006 frtliner columbia with det series 60 w/egr and
I have a 2006 frtliner columbia with det series 60 w/egr and it keeps on blowing turbo to exhaust manifold gasket.… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
2011 Kenworth T660 with Cummins ISX400 (with DEF and DPF),
2011 Kenworth T660 with Cummins ISX400 (with DEF and DPF), 9 speed Eaton. 227k miles on the engine. This engine randomly (intermittently) goes into high idle *without* the regen light, warn engine lig… read more
Joe
Joe
Service Technician
Associate Degree
824 satisfied customers
I have a 94 kenworth t800 with 425HP 3406B cat. Serial prefix
I have a 94 kenworth t800 with 425HP 3406B cat. Serial prefix 3ZJ. I'm having a fueling or timing problem I believe. It has developed a miss and lost power. Has new nozzles . After idling for short ti… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
I have a 2004 Freightliner Ambulance, FL60, with a Merc. Benz
I have a 2004 Freightliner Ambulance, FL60, with a Merc. Benz engine. 225,000 miles on it. Fuel smell while driving and or parked at idle. A lot of exhaust debris on the back wall of vehicle. No exter… read more
Clayton
Clayton
Technician
Vocational, Technical or Trade Scho
627 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

10,214 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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