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Related Medium and Heavy Trucks Questions
2009 Peterbilt 387 engine fan turns on for a short time and
2009 Peterbilt 387 engine fan turns on for a short time and turns off when driving in weather.The water temperature is at 180 and its cool outside. … read more
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I have a 2010 Peterbilt with a 489 Cummins no DEF. twice it
I have a 2010 Peterbilt with a 489 Cummins no DEF. twice it lost boost to about 8 psi a few weeks apart then I got fuel with water in it and it started losing boost again. I changed fuel filters and i… read more
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I'm having issues with a C 15, it back fires from the exhaust side … read more
Cat Man
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I have a 2006 Peterbilt 387 Cat C15. The AC is throwing hot
I have a 2006 Peterbilt 387 Cat C15. The AC is throwing hot air. I checked and the AC hose is frozen. Should I close the heat valves? There's 4 of them I think … read more
Daniel Wilson
Daniel Wilson
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Plz i need help with my cat engine ... 2004 peterbilt 379
Hello, plz i need help with my cat engine ... 2004 peterbilt 379 Cat c15 Mbn12209 Engine was overhauled 70k miles ago at peterbilt shop . In past few days the truck will derate and And won't accelerat… read more
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Cat Man
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I need to know the switch # 1 position of the service brake
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I have a 2008 C15 Cat SDP motor. My issue is when pulling a
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Cat Man
Cat Man
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I have a 2009 Kenworth w900l with a cat c15 sdp and I'm
Hello I have a 2009 Kenworth w900l with a cat c15 sdp and I'm having regen problems. Connected a scanner and code 3711 fmi 31 comes up. Have changed the mass flow sensor, ARD head and spark plug. Any … read more
Cat Man
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I have a 2009 peterbilt,it is wanting to build pressure in
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Cat Man, we have a 2008 Kenworth with Cat C15 SDP engine.
Cat Man, we have a 2008 Kenworth with Cat C15 SDP engine. The engine is derated, with code 3719-0. Forced regeneration failed with a 3711-31. At the end of forced regeneration attempt, we got error 11… read more
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Hello, im getting a sid 380 fmi 11 code. Chk engine light is
Hello, im getting a sid 380 fmi 11 code. Chk engine light is on and truck will only allow 75% load on engine at full throttle. The code from time to time goes inactive and truck runs normal,, should I… read more
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I am working on a 2008 Kenworth with Cat C-15. The truck has
I am working on a 2008 Kenworth with Cat C-15. The truck has been in the garage here for quite some time, very clean,well maintained truck. It has had numerous regen problems over the past few years a… read more
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I have a 2010 peterbilt 387 with a cummins isx CM871. The engine
I have a 2010 peterbilt 387 with a cummins isx CM871. The engine cranks but wont run. It did run only twice while here ...(Low idle, rough with no throttle response).Checked all the fuses...all good. … read more
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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

10,252 satisfied customers

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

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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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