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Related Medium and Heavy Trucks Questions
2006 peterbilt 379 tri axle dump truck, cat, 15 ascert ,,was
2006 peterbilt 379 tri axle dump truck , cat, 15 ascert ,,was runnning down the interstate just fine , I flipped the cruise control switch on and the truck just died , now it will turn over but not st… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
Have a 2002 Peterbilt 379 C-15 engine. The engine has been
have a 2002 Peterbilt 379 C-15 engine. The engine has been going up to 1000 rpms about every 30 seconds unless you press on the clutch. I noticed the crank sensor and it looks like the cam se … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I HAVE A 1996 PETERBILT 379 WITH WIRING ISSUE. PRIOR OWNER
I HAVE A 1996 PETERBILT 379 WITH WIRING ISSUE. PRIOR OWNER GOT CREATIVE. HE DIRECT WIRED FAN TO BE ON ALL THE TIME, THEN NEXT SHOP INSTALLED SWITCH FOR FOR FAN. EVERY TIME THE FAN IS TURNED ON IT BLOW… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
2004 Peterbilt 379.. very high coolant temp code. I replaced
2004 Peterbilt 379.. very high coolant temp code. I replaced both coolant sensors one for gauge. One for ecm and code still active I can't clear code from truck … read more
Nich1019
Nich1019
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Vocational, Technical or Trade School
63 satisfied customers
I replaced a damaged condenser on my 379 Pete which has a
I replaced a damaged condenser on my 379 Pete which has a sleeper. I'm also replacing the drier and orifice and expansion valve. Should I suck it down once before replacing them or just afterwards. … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
Cruise will not work. 05 peterbilt 379 cat accert c 15.
Cruise will not work JA: What's the make/model/year of your truck? Engine type? Customer: 05 peterbilt 379 cat accert c 15 JA: Are you fixing your truck yourself? What have you tried so far? Customer:… read more
Nich1019
Nich1019
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Vocational, Technical or Trade School
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C15 mxs died and no restart. 2006 Pete 379. Cat engine c15.
C15 mxs died and no restart JA: What's the make/model/year of your truck? Engine type? Customer: 2006 Pete 379 JA: Are you fixing your truck yourself? What have you tried so far? Customer: cat engine … read more
Nich1019
Nich1019
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Vocational, Technical or Trade School
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No engine brake unless cruise is set to a certain speed and
No engine brake unless cruise is set to a certain speed and I get rolling 3-4mph past set point … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
63 satisfied customers
I have a 379 Pete, the jake does not work. I have no power
I have a 379 Pete, the jake does not work. I have no power to the jake brake switch. Is this my problem?? … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
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Question for the cat man. I have a Caterpillar 6NZ serial
Question for the cat man. I have a Caterpillar 6NZ serial number. My cooling system is pressurizing causing coolant to spill out through the overflow tube. I thought this might be the cause of a bad a… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Have a 2017 Peterbilt 379 with a Cummins ISX 15. It is
Have a 2017 Peterbilt 379 with a Cummins ISX 15. It is coding 4726. Engine runs starts and stops as it should. Fuel decay test. Replaced fuel return valve, new high pressure pump, blocked off individu… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
HAVE 2001 PETERBILT 379 WITH C-15 ENGINE WENT TO START THIS
HAVE 2001 PETERBILT 379 WITH C-15 ENGINE WENT TO START THIS AFTERNOON, TURNS OVER FINE BUT WON'T START, SOUNDS … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I am working on a 2007 Peterbilt 387, it has a Eaton
I am working on a 2007 Peterbilt 387, it has a Eaton Autoshift no clutch pedal. The transmission will not go into gear … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
I HAVE 2005 PETERBILT 379 THAT WE HAD RUNNING IN OUR SHOP WE
I HAVE 2005 PETERBILT 379 THAT WE HAD RUNNING IN OUR SHOP WE ENGUAGED ENGINE FAN BY TURNING ON FAN OVERRIDE SWITCH ON DASH ,IT IMMEDIATELY SHUT MOTOR OFF. HAVE NOT BEEN ABLE TO RESTART TRUCK. WE HAVE … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I am trying to find the engine family# on my cat c-15
I am trying to find the engine family# ***** my cat c-15 Accert … read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,325 satisfied customers
Speedometer doesn't work only works part of time but doesn't
Speedometer doesn't work only works part of time but doesn't read right I think short wire … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
The fan doesnt come on with jakes or when engine temp is hot
the fan doesnt come on with jakes or when engine temp is hot in our 1998 peterbilt 378 with a 3406e … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Hi Cat Man, Iam working on a C-15 CAT Accert Engine.Serial
Hi Cat Man, I'am working on a C-15 CAT Accert Engine.Serial # XXXXX engine was starting to run rough then it eventually just quit running.My customer said there was a code displayed on his dash comput… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
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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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