Medium and Heavy Trucks

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I have a 2006 Peterbilt 379 with a MXS Acert 550hp 1850
I have a 2006 Peterbilt 379 with a MXS Acert 550hp 1850 Torque file. Has 160,000 on an overhaul and since the overhaul seems to me that my pyrometer is running hotter than it should. Since the overhau… read more
NicholasM1019
NicholasM1019
Diesel Technician
Vocational, Technical or Trade School
10 satisfied customers
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
10,252 satisfied customers
C15 cat, boost sensor was replaced at cat dealership and
C15 cat, boost sensor was replaced at cat dealership and truck had 60 pounds of boost the day I picked it up, drove home cut truck off and the next day it wouldn?t get over 30 psi, every once in a whi… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
Need someone that is an expert with Paccar MX 13 engines and
Need someone that is an expert with Paccar MX 13 engines and the cooling system? … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I converted my c15 mxs to a single turbo. got the program to
I converted my c15 mxs to a single turbo. got the program to delete my IVA's. Everything worked well for months then out of nowhere the engine started to derate me whenever I use my eng brake. If I st… read more
Bradey V
Bradey V
Certificate
Have 3406e with serial number 5ek67120 truck was running
have 3406e with serial number 5ek67120 truck was running excellent and customer installed after market programmer and on intial power up and test drive check engine light came on I pulled codes and go… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
I have a C15 Acert MXS that has low power, low boost and
I have a C15 Acert MXS that has low power, low boost and high egt. Seems to get worse the longer the truck runs. Truck has been to a Peterbilt dealer and can't find any boost leak.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
Have a question. 06 kenworth t600 cat c15 mxs. Myself. The
the engine was rebuilt 4 months ago now it is pushing coolant out of the radiator but not always… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
Helli. I have problem in my kw t600 which Cat c15 to fuel
I have problem in my kw t600 which Cat c15 to fuel tank level not equalize … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
Cat man, I've got a Acert MXS....625 h.p. 2007 year....
Hello Cat man, I've got a Acert MXS....625 h.p. 2007 year.... pulls fantastic on take off and through out all 13 gears on flat ground however, when I pull a moderate grade incline, it seems to lack po… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
2005 KW W900 with a Cat (mxs16734) customer complaint of a
2005 KW W900 with a Cat (mxs16734) customer complaint of a miss while driving. Heavier the load the more frequent the miss. We found 2 weak IVA's and replaced them. Customer took the truck for test dr… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
Need some questions answered about my mbe4000, I have a 05
I have a 05 Freightliner Columbia about 786k and need ahead gasket done, just leaking no other problems, so my local mechanics did that but after there were some power problems on it … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a c15 acert and a 2001 c15 single turbo in a Pete can
I have a c15 acert and a 2001 c15 single turbo in a Pete can I swap them and what problems would I have… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
I have 2006 C15 acert mxs model,two days ago while cruising
I have 2006 C15 acert mxs model,two days ago while cruising at 60pmh oil pressure dropped to 20psi and the protect engine light came on,after 2-3 second the oil pressure went back to 60psi and the pro… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
Good morning, I have a 2005 kw w900l c15 acert 550 have been
Good morning, I have a 2005 kw w900l c15 acert 550 have been having a few problems First getting oil in the coolent had the oil cooler changed they did not flush the system good so I did it again was … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
Have a 2006 kenworth T600 with Cat C-15 in it. Doesnt seem
Have a 2006 kenworth T600 with Cat C-15 in it. Doesn't seem to have pulling power with load hooked up to it and have to shift between gears alot. Power ok no load. Had a bad turbo and replaced. Also e… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
i have a cat c15 acert the engine vibrate very much on idealing
i have a cat c15 acert the engine vibrate very much on idealing and turns out to be ok when we increase rpm what could be the problem. need tune-up or something else.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
I have a 2008 Peterbilt with a 2007 ISX 485 engine. I have
I have a 2008 Peterbilt with a 2007 ISX 485 engine. I have low turbo boost and a de-rate condition along with no state 3 engine brake. Some of the time the truck runs great, other times it has low pow… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 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

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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

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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

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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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