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Related Medium and Heavy Trucks Questions
Ac quit working not showing voltage at compressor battery
Ac quit working not showing voltage at compressor battery voltage is dropping. Battery voltage not showing on alternator … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,084 satisfied customers
475 acert low boost went from 50 lbs to 30 sometimes gets 32
475 acert low boost went from 50 lbs to 30 sometimes gets 32 but falls back about 10 lbs when you step on throttle it's in a 07 Pete and it's a mxs … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
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I have a 2015 Ford F-350 6.7 Ltr. diesel and the battery
I have a 2015 Ford F-350 6.7 Ltr. diesel and the battery light is on on the dash. It comes on about 20 sec.s after I start the engine. Also, the engine idle is up slightly when the light is on. I rece… read more
Chris (aka-Moose)
Chris (aka-Moose)
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Vocational, Technical or Trade School
353 satisfied customers
2014 f650 6.7 diesel. Apparently in recent past the
2014 f650 6.7 diesel. Apparently in recent past the alternator was replaced but the guy did not correctly connect batteries so that the batteries were not being charged- corrected wiring and truck ran… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
2004 cat acert c15 Diesel engine over heats only when boost
2004 cat acert c15 Diesel engine over heats only when boost pressure reaches over 30 psi with light loads and 17 psi with heavy loads. No coolant loss or oil. Compression is good on all cylinders. Wil… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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Only getting 2.8 volts to the fuse box. 2005 Pete 379 x
Only getting 2.8 volts to the fuse box JA: What's the make/model/year of your truck? Engine type? Customer: 2005 Pete 379 x JA: Are you fixing your truck yourself? What have you tried so far? Customer… read more
AMANDEEP MAHERU
AMANDEEP MAHERU
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I have a Freightliner chassis motor home with a Cummings 390
I have a Freightliner chassis motor home with a Cummings 390 pusher. The batteries went dead and we came in on the alternator. After the batteries showed "Low Battery" on the instrument panel for abou… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
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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
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Cummins 425 isx. Problems in order; low battery voltage
Cummins 425 isx. Problems in order; low battery voltage followed by loss of jake brake, ventilation, then instrument panel dead. About 2 miles fan ran then engine shut down. If u turn key off it will … read more
Roy Belding
Roy Belding
7,583 satisfied customers
I have an 07 Cat C-13 ACERT with prefix KCB. It sometimes
I have an 07 Cat C-13 ACERT with prefix KCB. It sometimes has a strong miss at 1500 while pulling a load. The miss gets less strong up to about 1700. It doesn't happen consistently. When it does occur… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have a 2007 c15 acert engine in a international 9900xi...
I have a 2007 c15 acert engine in a international 9900xi... when under pull or acceleration have a drop in voltage … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
I'm not able to build boost I have replaced turbo and turbo
I'm not able to build boost I have replaced turbo and turbo control valve . I have a active code saying the vgt driver circuit is high voltage . it is a 2005 pete with a cummins 475 … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,084 satisfied customers
I'm losing battery voltage. I have a new alternator, new
Hi, I'm losing battery voltage . I have a new alternator, new batteries . I've clean all battery cables. Still losing voltage.starter stand a news … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
. Just rolled 1.1 million miles on my 475 hp acert in
Hello. Just rolled 1.1 million miles on my 475 hp acert in an 05 pete 379. I bought it at 570k miles from my dads rigging company in CA. It has been a VERY reliable engine for me. I have several ???s … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I'm from California and I'm buying a 2008 Kenworth t800 with a 2007 c15 acert (a
I'm from California and I'm buying a 2008 Kenworth t800 with a 2007 c15 acert (approx 495,000 miles on the odo) because of the new CARB laws, and I've only heard bad things about the motor, aside from… read more
Cat Man
Cat Man
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I have 02 Freightliner Century that started showing 11.9v
I have 02 Freightliner Century that started showing 11.9v on the gauge this week. Changed alternator and all 4 batteries and still at 11.9 instead of usual 14v. What else should I check?… read more
Roy Belding
Roy Belding
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I have a 2004 ISL 400 that is reading erratic on mileage. What
I have a 2004 ISL 400 that is reading erratic on mileage. What controls the odometer reading with this engine and is it something that can be replaced if found defective? If so, how you do get it set … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,084 satisfied customers
I have a 2009 387 peterbilt. I can be driving along and trek
I have a 2009 387 peterbilt. I can be driving along and trek will shut down. At this point all needles and gauges are waving back and forth. I get out and spray some either and trk starts. Sometimes y… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
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2,740 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

5,084 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,234 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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