Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Connect one-on-one with {0} who will answer your question

Related Medium and Heavy Trucks Questions
CAT C15 MBN lost nearly all power up and started stumbling.
CAT C15 MBN lost nearly all power up hill and started stumbling. Truck runs fine without a loaded trailer on has a minor pop coming out of stack at idle and a miss at 1500rpm. Checked fuel pressure 80… read more
NicholasM1019
NicholasM1019
Diesel Technician
Vocational, Technical or Trade School
10 satisfied customers
2013 MAXXFORCE 9 MODEL A330 9.3L This truck has no codes,
2013 MAXXFORCE 9 MODEL A330 9.3L This truck has no codes, also has no power, if you take off from a red light it will not create any boost, no vgt, the high pressure turbo does use an integrated waste… read more
Scott Anthony
Scott Anthony
Master Technician
HS Diploma
2 satisfied customers
I have a c15 it has a small miss at times like a fluttering
Hi i have a c15 it has a small miss at times like a fluttering also the jakes are the same i have low boost and it just dont respond. Swapped ecms external harness boost and atmosphere sensors did cyl… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
C 15 mbn smoking and has a hiss noise consistent with engine
C 15 mbn smoking and has a hiss noise consistent with engine speed. Smoke smells like fuel. When I fired it up it smoked white then blue. I checked the oil. No coolant in the oil. … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
I have 1999. Kenworth T800 475 cat. 3406 E It's only making
I have 1999. Kenworth T800 475 cat. 3406 E It's only making about 15 psi boost - Low power - No codes in computer - I changed fuel filters and air filter and also checked air charge boots and tried to… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
210 satisfied customers
I have a 1999 kw with a c12 in it. 2ks08096 I did an in
I have a 1999 kw with a c12 in it . 2ks08096 I did an in frame on it and put reman injectors and new cam. It has 80psi fuel pressure at idle and up to 140 at 1800 rpm driving. It just doesn't have any… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
I've been following this thread. Have an 07 T800 KW. That
I've been following this thread. Have an 07 T800 KW. That intermittently develops a miss or stalls from time to time at an idle. Fuel pressure fluctuates from 65 to 70psi @ idle to 80psi at 1500 rpm. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
Cat Man. I currently have a 2007 Pete 379 with a NXS acert.
Hi Cat Man. I currently have a 2007 Pete 379 with a NXS acert. It is a factory 475/1850 tune but last weekend I changed it to the 550/1850 brake saver tune and when I went out on the road I could tell… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
I have a C15 Acert MXS that has low power, low boost and
I have a C15 Acert MXS that has low power, low boost and high egt. Seems to get worse the longer the truck runs. Truck has been to a Peterbilt dealer and can't find any boost leak.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
I have a c15 acert and a 2001 c15 single turbo in a Pete can
I have a c15 acert and a 2001 c15 single turbo in a Pete can I swap them and what problems would I have… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
Does dual exhaust or larger diameter exhaust effect engine temp and performance? 2004 c15
Does dual exhaust or larger diameter exhaust effect engine temp and performance? 2004 c15 475 cat coded to 550, twin turbo with 4 inch single exhaust. 4.10 gear with 18 speed eaton Pulling super-b gra… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
catman I have an spd c15 that breaks up when it gets to 40
catman I have an spd c15 that breaks up when it gets to 40 psi on the boost. Its like it is starving for fuel. I can't find my original question but I asked about this last week i think. Originally, I… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
Im working on a c13 cat engine in a kenworth truck, the engine
I'm working on a c13 cat engine in a kenworth truck, the engine has no power, when you rev up on the engine it makes a loud "swooshing" noise from the right side I think, I pressured up the after cool… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
Have a 6nz fuel return very hot put second new pump as well
Have a 6nz fuel return very hot put second new pump as well as bypass and regulator valves new filter housing fuel lines diverted valve on return wiring harnesses ECM to head and inside new injectors … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
I have an 2005 Kenworth with a 475 acert c15 twin turbo MXS
I have an 2005 Kenworth with a 475 acert c15 twin turbo MXS model. It has just over a million miles. I change my oil every 13,000 - 15,000.change fuel filters every 6,000 miles also.when I bought the … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
I have an 07 kw w900 with cats latest model motor the c15
I have an 07 kw w900 with cat's latest model motor the c15 475 6nz with the twin turbo and automatic regeneration system. It appears to have an increase of crankcase pressure due to it seemingly tryin… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
I have a question about a 2006 freightliner with a 14L detriot.
I have a question about a 2006 freightliner with a 14L detriot. Truck is acting like it is back firing through the exhaust. When I upshift it sounds like the turbo slows down, I lose power for a secon… read more
Jim
Jim
Diesel tech.
212 satisfied customers
I have a 2007 F750 with a cat C7, I have low respose under
I have a 2007 F750 with a cat C7, I have low respose under acceleration like the turbo is not working. I have checked all the intercooler lines (ok) I can only generate 18 lbs of boost pressure and I … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
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.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

10,253 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

< Previous | Next >

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.

Show MoreShow Less

Ask Your Question

x