Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have a cat acert c15 had a few small sputters today and a
I have a cat acert c15 had a few small sputters today and a lose of power as if I was going up hill. Seems to idle great rev great but just not as much power. I opened the fuel water separator “metal … read more
Justin
Justin
Diesel Technician
Vocational, Technical or Trade School
8 satisfied customers
Peterbilt 379 with CAT C15 new compressor dryer and
Peterbilt 379 with CAT C15 new compressor dryer and regulator assembly new no air leaks and it barely builds enough air to drive. It will not get over 100psi at idle truck must be revved up to achieve… read more
Nich1019
Nich1019
Cummins/Caterpillar Technician
Vocational, Technical or Trade School
3,273 satisfied customers
Have 379 peterbilt with a C15 cat engine. Sn#mkS03665. I
Have 379 peterbilt with a C15 cat engine. Sn#mkS03665. I have leaking oil around belly pan, out of dip stick and breather hose. I also have oil leaking out of the top turbo near the oil lines. Also ha… read more
Nich1019
Nich1019
Cummins/Caterpillar Technician
Vocational, Technical or Trade School
3,273 satisfied customers
I have questions about my cat c15 acert. Debating on doing a
Second opinion] I have questions about my cat c15 acert … read more
JeremyTruckTech
JeremyTruckTech
Service Manager
High School
52 satisfied customers
I have questions about my cat c15 acert. Debating on doing a
debating on doing a rebuild with single turbo conversion but I talked to a guy said put 16-1 pistons in it program computer and leave the twin turbos on it. Is this possible or will it work without failure down the road? … read more
Justin
Justin
Diesel Technician
Vocational, Technical or Trade School
8 satisfied customers
I would like to know what engine and transmission comes with
I would like to know what engine and transmission comes with this truck please 2007 Peterbilt 379*****************… read more
Nich1019
Nich1019
Cummins/Caterpillar Technician
Vocational, Technical or Trade School
3,273 satisfied customers
04 peterbilt 379 with c15. Engine fan won't come on unless I
04 peterbilt 379 with c15 . Engine fan won't come on unless I do it manually with the switch in the dash … read more
Nich1019
Nich1019
Cummins/Caterpillar Technician
Vocational, Technical or Trade School
3,273 satisfied customers
Help we are loosing water On 2006 Acert C15 cat engine in a
Help we are loosing water On 2006 Acert C15 cat engine in a 379 Peterbilt truck what could cause this I can't find the leak but it still is getting away… read more
Nich1019
Nich1019
Cummins/Caterpillar Technician
Vocational, Technical or Trade School
3,273 satisfied customers
We have a C15 that is not overheating but is losing about a
We have a C15 that is not overheating but is losing about a gallon of water a day. It had a negative bottle test. Replaced the air compressor but it is still losing water. Cannot find any leaks … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
Check engine light is on and off. I check the flash code and
Check engine light is on and off. I check the flash code and it coming up “42” … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
Have cat motor need some help. Dump truck 347000 miles. 2006
trying to determain wheather or not my oil pressure gauge is bad by using a manual gauge on the motor need help finding location where to connect gauge … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
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
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
2002 379 pete c15 6nz cat .engine will not start without
2002 379 pete c15 6nz cat .engine will not start without either . has new fuel pump new injectors new cam and crank sensors new engine wiring harness new check valves new filter housing, new ecm. Has … read more
Edward Haniewski
Edward Haniewski
General Studies/Automotive
1 satisfied customers
Just in framed my mxs c15 last week its been about 600 miles
just in framed my mxs c15 last week its been about 600 miles and every time i pull a big hill loaded at 105k i lose about a gallon of oil out the blow by tube, which it did that before the inframe and… read more
Eddy
Eddy
HD Truck Tech
GED
2 satisfied customers
05 c15 getting oil in fuel tanks using a gallon of oil every
05 c15 getting oil in fuel tanks using a gallon of oil every 1000 miles … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I have a 2011 peterbilt with c15 cat it's losing coolant
I have a 2011 peterbilt with c15 cat it's losing coolant about 1 gallon per 100 miles it has no leaks it's not getting in the oil and not smoking … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
Have a 2004 peterbilt 379. There is voltage drop after it
have a 2004 peterbilt 379. There is voltage drop after it has been running for about 5 min with lights and cab equipment dimming or stopping. Engine continues to run. Replaced batteries and continues.… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have a 2007 Peterbilt 379 with a C15 engine that is losing
I have a 2007 Peterbilt 379 with a C15 engine that is losing a lot of antifreeze but does not have any visible leaks other than the drain tube from the reservoir. It is building high pressure, but is … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

6,062 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,353 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

5,115 satisfied customers

worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

2,756 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

Curtis B.

Curtis B.

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Technician turned service manager on multiple lines of trucks and engines, used in industry.

cumminsdr

cumminsdr

Mechanic

1,886 satisfied customers

All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

641 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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