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Related Medium and Heavy Trucks Questions
2004 peterbilt 379 cat c15 mbn I have been noticing a noise
Hello 2004 peterbilt 379 cat c15 mbn I have been noticing a noise coming from the Secondary fuel filter housing sound like kind of air leak but it's not air leak . So when I unscrew the valve that on … read more
TomcM28
TomcM28
Owner
Associates
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2004 cat c15 mbn I'm experiencing low power recently fuel
Hello 2004 cat c15 mbn I'm experiencing low power recently fuel pressure 80 to 88 psi all the time, so today I pressurized the boost system by connecting air supply 30 psi on right side of CAC intake … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
2004 Peterbilt 379 with cat c15 mbn The truck starts fine in
Hello 2004 Peterbilt 379 with cat c15 mbn The truck starts fine in the morning , but after I get to operation temperature it will vibrate at idle then it will drive rough when I take off between 1000 … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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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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I have a 2004 379 with C15 MBN. This engine will pull great
I have a 2004 379 with C15 MBN. This engine will pull great in Colorado all day long no problem from Grand Junction up to this high country I'll Telluride. From Grand Junction to Denver on the less ag… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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I bought a used 2005 peterbilt 379 with a twin turbo c15
i bought a used 2005 peterbilt 379 with a twin turbo c15 truck drove fine home but when i hooked to a trailer the truck has no pulling power it did have a code in it for a intake valve actuator and i … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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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
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have a 04 pete 379 couple years ago it started running
I have a 04 pete 379 couple years ago it started running warmer than normal empty or loaded like it wasn't getting any air but I could flip my fan on and it would cool right back down, so I broke down… read more
james Roberts
james Roberts
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Vocational, Technical or Trade School
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2004 Peterbilt 379 cat c15 mbn I just noticed oil leak
Hello 2004 Peterbilt 379 cat c15 mbn I just noticed oil leak coming from behind the fan clutch and it's making a mess in front of the engine, I'm wondering about the source of the leak… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Vibration in floor board and accelerater its worst in high
Vibration in floor board and accelerater its worst in high rpm and also when I let my foot off accelerater going down hill … read more
Bradey V
Bradey V
Certificate
Codes 289-6 and 290-6 comes up on my 2007 peterbilt 379, cat
Codes 289-6 and 290-6 comes up on my 2007 peterbilt 379, cat c15 … read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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I have a 2005 peterbilt 379 with a cat acert C15 in it the
I have a 2005 peterbilt 379 with a cat acert C15 in it the blower motor will not work on any speed I have gotten the multimeter out and started checking when I go to any point in the system be at the … read more
Andy
Andy
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Vocational, Technical or Trade School
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My engine fan will not turn on. Either with the manual
My engine fan will not turn on. Either with the manual switch or just letting the ecm do it by water temp. I've replaced the fan air solenoid and it still will not engage. Unless I cut the wires to th… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a c15 accert in a 2007 peterbilt. The engine has a
I have a c15 accert in a 2007 peterbilt. The engine has a miss at lower rpms, with light blue smoke. … read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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Cat c15 has no boost and height exhaust temp. Turbos are
Cat c15 has no boost and height exhaust temp. Turbos are both good and there are no leaks when a pressure test is done. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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Mbn c15 no power fuel psi at wot 90 psi at idle 80 psi gauge
Mbn c15 no power fuel psi at wot 90 psi at idle 80 psi gauge bounces … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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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
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10,344 satisfied customers
To. CAT-MAN, On a 2005 Freightliner columbia with Cat engine
To. CAT-MAN, On a 2005 Freightliner columbia with Cat engine C13 serial #Kcb17832 when driving engine shakes and hesitates on low Rpms 1300 below and rpm gauge is not stable, needle goes up and down w… read more
Cat Man
Cat Man
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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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