Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Ask an Expert,
Get an Answer ASAP!

Related Medium and Heavy Trucks Questions
Picked up a GMC 7500 with a C7 CAT VIN# KAL77538, they did
picked up a GMC 7500 with a C7 CAT VIN# ***** they did one piston and liner, re ringed the other 5 and put used injectors in... truck smokes whitish grey, smells like diesel to the point it burns your… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,530 satisfied customers
I have a 89 f 600 with a 6.6 diesel engine Is smoking when
I have a 89 f 600 with a 6.6 diesel engine Is smoking when under load I replaced fuel filters and did oil change and new filters and some smoke did go away it's smoking lot last now just wanted to see… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
3,929 satisfied customers
I have an old V671 natural with C65 injectors if put in N71
I have an old V671 natural with C65 injectors if put in N71 will it increase horse power much … read more
Curtis B.
Curtis B.
Technician
Associate Degree
991 satisfied customers
1997 IH 4600 fire truck DT466E last 8 of vinWH537274. Eng
1997 IH 4600 fire truck DT466E last 8 of vinWH537274. Eng s/n 466HM2u1071294 249hp 2244 engine hours. Started with engine dying a couple of times when driven and pumped under light load. It would rest… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
Having a problem w/ a 2001 Freightliner w/ a Detroit series
Having a problem w/ a 2001 Freightliner w/ a Detroit series 60. The truck will skip intermittently and blow white smoke. The truck has had an in frame done that includes new head, injectors, turbo, fu… read more
Roy
Roy
shop foreman
Associate Degree
4,485 satisfied customers
I have a 2001 GMC C7500 with a Caterpillar 3126 engine. The
I have a 2001 GMC C7500 with a Caterpillar 3126 engine. The engine stalls going down the road and it sputters every so often with white smoke coming out of the exhaust. The truck runs fine while its i… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,530 satisfied customers
ACTERRA: I have a 2004 Sterling with a Diesel Mercedes Eng.
I have a 2004 Sterling with a Diesel Mercedes Eng. with 38,000 miles. Rating is 230HP @ 2300 RPM Serial #(###) ###-#### Yesterday driving down the interstate and truck lost power with top of 40MPH and… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
29,925 satisfied customers
I have a 2006 cummins, about a year ago I started my truck
Hi there, I have a 2006 cummins , about a year ago I started my truck ran good then 1min later truck was shaking sounded like it was missing, engine light came on used my scanner said the code was cyl… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
cat 257b had fuel tank wire brushed cleaned out and some other
cat 257b had fuel tank wire brushed cleaned out and some other things redone a few months ago when vehicle started losing power. smoking sputtering especially when under a load. go it back ran fine fo… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,283 satisfied customers
07' columbia/S60 Vin#Y91934 Truck lost all power 2-3 hours
07' columbia/S60 Vin#Y91934 Truck lost all power 2-3 hours into trip. No AWL. I drive 8 hours to truck and test drive for 4 miles and everything seems to be good. Next day we continue trip and about 3… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
I have c15 acert bxs 38090.It is smoking white out exhaust
I have c15 acert bxs 38090.It is smoking white out exhaust when I get off the throttle and smells like fuel to lean loss of power also and seems like its missing… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,530 satisfied customers
I have got a 1990 ford truck w/l10 cummins engine smoking
I have got a 1990 ford ltl9000 med.duty truck w/l10 cummins engine smoking from exhaust & getting less than 2 mpg we have replaced injectors for smoking at idle after doing that went from 7mpg to unde… read more
Geoff
Geoff
BS
8 satisfied customers
I have a 2000 KW T800 with a Cummins ISM. This winter I had
I have a 2000 KW T800 with a Cummins ISM. This winter I had a fuel gel problem and since then the truck smokes really bad after idling (red lights ect.) but clears up after I start gearing up. Smoke i… read more
Don
Don
fleet superintendent
Vocational, Technical or Trade Scho
1,615 satisfied customers
2007 freightliner century Detroit 60 series runs cool in cold
2007 freightliner century Detroit 60 series runs cool in cold wether less than 125 degrees, blows out cold air while driving, heat works when truck is Idilng!… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,530 satisfied customers
Hi I am running an 06 MAN TGA 440 tractor Unit. We had a problem
Hi I am running an 06 MAN TGA 440 tractor Unit. We had a problem losing coolant, this we have cleared this by changing compressor and reconditioning the EGR. It is now running and pulling fine and not… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,892 satisfied customers
2006 Mitsubishi Fuso Model FM 260 This truck has no Power
2006 Mitsubishi Fuso Model FM 260 This truck has no Power and have a check engine light.Mi scanner cant read the codes… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
3,929 satisfied customers
Hi, my name isXXXXX own Freightliner Century 2004 Detroit
Hi, my name isXXXXX own Freightliner Century 2004 Detroit 60 engine last 6 vin M12223. Have a loss of power issue with my truck . And this killing me. When I driving without trailer everything is fine… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
we have a strong diesel fuel smell inside our school bus from
we have a strong diesel fuel smell inside our school bus from a C7 engine. no fuel leaks. the antifreeze and oil were analyzed and came back good . I replaced all the O rings on the injectors but ther… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,351 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

2,803 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

4,530 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

2,892 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

3,929 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician

cumminsdr

cumminsdr

Mechanic

1,351 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

991 satisfied customers

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

dieseldan55

dieseldan55

Contractor

74 satisfied customers

Road Service mechanic for Volvo Construction.

< 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