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
SECOND OPINION DO NOT CLOSE] I have a 3126 ECM that is
SECOND OPINION DO NOT CLOSE] I have a 3126 ECM that is sending desired Inj Act pressure to 1450 at initial start than after about a minute it drops to 870 and runs smooth. For the minute is surging in… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,672 satisfied customers
1999 freightliner fl60. Was going to get inspected and check
was going to get inspected and check engine light came on only when stopped when was driving it went away then got back home was checking it out nothing looked wrong then it cut out and died now jusyt turn over and wont start … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
203 satisfied customers
Got a 2010 kenworth t800 with a cummins... driver says
got a 2010 kenworth t800 with a cummins... driver says sometimes it won't start and on occasion will cut off going down road,, he'll cut key off and back on until it starts... pulling a code 1117 as i… read more
Roy
Roy
shop foreman
Associate Degree
5,213 satisfied customers
I have a 2001 freightliner FL70 with cat 3126 wont start
i have a 2001 freightliner FL70 with cat 3126 wont start check engine light and glow plug light flash intermittantly … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,968 satisfied customers
Engine is Cat C7 in 2006 F650, Vin: 3frnw66x56v235167, 67000
Engine is Cat C7 in 2006 F650, Vin: 3frnw66x56v235167, 67000 milesEngine starts up and runs for a few minutes then gradually runs rougher and stalls as though it is running out of fuel or pulling air.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,968 satisfied customers
International 9200i with cummins isx engine #79152097 fault
International 9200i with cummins isx engine #79152097 fault code on dash is 128 fo2 5id251. What is the code and can i drive the truck? When it comes on the truck derates for a few seconds with the re… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,458 satisfied customers
3126 cat will only start on ether. 8yl54721 in a 2000
heui pump replaced, cam sensors replaced, checked cam sensor gap, installed 2 different test ecm's, checked for injector oil leaks, have 1300 psi oil at block, good fuel pressure, good power and grounds at ecm, checked ecm harness and load tested wires, after starting with ether it runs smooth all day. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,968 satisfied customers
I have a 99 Freightliner FL 80 with a cat 3126. It is acting
Hi, I have a 99 Freightliner FL 80 with a cat 3126. It is acting like it is running out of fuel. I have replaced the filter, and have checked it several times. One time, the filter was only half full.… read more
FIX-IT
FIX-IT
Comercial transport technician
Vocational, Technical or Trade Scho
829 satisfied customers
I have a 3126 7LZ741 with error code 164-00. IAP is over
Hi I have a 3126 7LZ741 with error code 164-00. IAP is over 4000 PSI with Manometer and with CAT ET. I change the IAP Valve, same problem, I checked the IAP VALVE-ECM Circuit there was continuity with… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,968 satisfied customers
Will not go over 15 mph at times while reading with scanner
will not go over 15 mph at times while reading with scanner injection pressure reading freezes at the same time there is a slight quick rpm change and check engine lite comes on.. All at idle.. while … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,968 satisfied customers
Have a 2005 freightliner with a 3126 cat motor, cranks but
Have a 2005 freightliner with a 3126 cat motor, cranks but wo't start ihave 2 active codes pid 164 fmi3 injection actuater pressure and pid110 fmi 3 coolant temp voltage high. I am not even showing th… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,968 satisfied customers
I have a 2000 F650 with a 7.2L cat. No start condition. No
I have a 2000 F650 with a 7.2L cat. No start condition. No fault code, cranking rpm 215, icp is 145psi while cranking, starts and runs on wd40, icp goes up to 1300psi. Engine oil level is good and eng… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,968 satisfied customers
I have a 2000 gmc c7500 with a 3126 cat in it. We hooked a
I have a 2000 gmc c7500 with a 3126 cat in it. We hooked a Cat Et up to it this evening with the right adapter I assume...7x-1714. The Cat et program says 1 ECM detected...initializing but not does an… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,968 satisfied customers
Mr. Cat Man, I Have a C7 esn:SAP10990 with code 164-11. I
Mr. Cat Man, I Have a C7 esn:SAP10990 with code 164-11. I have changed the IAP sensor and still with et my actual IAP is 400-600psi high than my desired iap. I noticed that all my injectors all squirt… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,968 satisfied customers
Im working on a c7 in a truck. I have 1740psi injection actuation
Im working on a c7 in a truck. I have 1740psi injection actuation pressure at idle. have changed huei pump, iap sensor, injectors, and ecm. fuel pressure is 60 at idle. truck misses bad below 2000rpm.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,968 satisfied customers
1999 Chevy C6500 with a Cat 3126 7AS42722. Truck starts cold
1999 Chevy C6500 with a Cat 3126 7AS42722. Truck starts cold but after it warms up will not start, I can shoot a little ether in it and it will start right back up, read one of your post and you expla… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,968 satisfied customers
1995 freightliner with 12.7 detriot engine fan will not come
1995 freightliner with 12.7 detriot engine fan will not come on.tempgage surg up and drop down real fast. change both thermostat could it be sending unit or faulty fan switch… read more
Jim
Jim
Diesel tech.
212 satisfied customers
I have a cat 3126 in a 2001 fl70 farm truck. came in with a
I have a cat 3126 in a 2001 fl70 farm truck. came in with a load last night, no power. Fuel filters have 200 miles, but that's what it acts like. Flash code 39 Harlan… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,968 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

3,632 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

9,968 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

3,400 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,672 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

1,458 satisfied customers

All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

149 satisfied customers

16 years of experience

dieseldan55

dieseldan55

Contractor

77 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