Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

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

I have a cat 3126 does not have 12v in the ipr plug.

Customer Question
I have a cat...

I have a cat 3126 does not have 12v in the ipr plug

Mechanic's Assistant: What is the complete model and serial number of your machine?

Caterpillar 3126 engine

Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. The Heavy Equipment Mechanic I'm going to connect you with knows all the tricks and shortcuts.

Ok

Mechanic's Assistant: Are you fixing this yourself? What have you tried so far?

The engine is running and suddenly it went off and has not started anymore

Mechanic's Assistant: Anything else you want the Equipment Mechanic to know before I connect you?

I have volts in the ICP

Submitted: 1 year ago.Category: Medium and Heavy Trucks
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 12 minutes by:
12/14/2020
Technician: Cat Man, Cat Engine Expert replied 1 year ago
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
Experience: I am ASE Master Truck Certified.
Verified
Thanks for asking your question. I will try and help you out.
Can you elaborate on your question please?
Are you measuring the voltage to the ipr while cranking?
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
I am not measuring it with the switch on
Technician: Cat Man, Cat Engine Expert replied 1 year ago
Thanks for asking your question. I will try and help you out.
The ecm will not send voltage to the ipr until the ecm receives an rpm signal.
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
before this change the oring of the injectors. Then I started and it was on for 30 minutes and it turned off and does not want to start again
Technician: Cat Man, Cat Engine Expert replied 1 year ago
Does the yellow check engine light come on when the key is turned to the on position?
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
when he turned the key the yellow engine light did not illuminate
Technician: Cat Man, Cat Engine Expert replied 1 year ago
Thanks for the information.If the yellow check engine light does not come on when the key is turned to the on position and the engine will not start, there are only 2 things that can cause this.The first and most common is the engine ECM is not getting the correct power and ground to function. The ECM should have power on pins 52, 53, and 70 of the rear most ECM connector. This is the truck side harness connector. 70 is the key switch wire. The grounds are on pins 65 and 67. You can remove the connector and check for power on these pins. If you do not have power on these pins, you most likely have a blown fuse in the electrical system. I would check all fuses first.If you do have correct power and ground to the ECM, you most likely have a failed ECM. I have seen this many times over the years. To confirm the ECM is bad, you would need to install a known good ECM on the engine or you can take the ECM to the dealer to be tested. Unfortunately the ECM cannot be repaired. Replacement is the only option. I am sorry. I wish I had better news.Please reply back if you need more help or have more questions. I am happy to assist.
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
Can you send me some diagram of the 1999 freightliner fl60 fuse box and the location of the ecm fuse
Technician: Cat Man, Cat Engine Expert replied 1 year ago
Sorry. I do
Not have access to freightliner info.
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
Ok thanks
Technician: Cat Man, Cat Engine Expert replied 1 year ago
You are very welcome. I am happy I could help.
Ask Your Own Medium and Heavy Trucks Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Cat Man Your Own Question
Cat Man
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
10,344 Satisfied Customers
Experience: I am ASE Master Truck Certified.

Cat Man is online now

Related Medium and Heavy Trucks Questions
I have a 3126 cat. Code 164-11. I've replaced 6 pack
I have a 3126 cat. Code 164-11. I've replaced 6 pack injectors, oil pump, ipr, injection pressure sensor. Still no start. Spray a very little starting fluid. Start up good. Only. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
6.0 ford cranks over for extended period. shut off and will
6.0 ford cranks over for extended period. shut off and will start right up. let sit for 30 sec and hard starts again… read more
Chris (aka-Moose)
Chris (aka-Moose)
Technician
641 satisfied customers
Working on a GMC 7500 2002 vin # ***************** has a
Working on a GMC 7500 2002 vin # ***************** has a 3126 cat. Truck was parked for a couple weeks and would not start. Tried to scan but we're not getting ecm to communicate. Looked in battery bo… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
Second Opinion, Not a Duplicate) Code 333 with 2003 ih 4300.
Second Opinion, Not a Duplicate) Customer: Code 333 with 2003 ih 4300… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
I have a 2009 maxforce vin#***************** No start and
Good afternoon, my name is***** have a 2009 maxforce vin#***************** No start and has icp code Only builds 500psi on the crank I know it needs 700psi to fire replaced icp but this engine has two… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
International DT466E Crank no start. Unable to build icp
International DT466E Crank no start. Unable to build icp during crankingAlready replaced ipr Base engine oil pressure while cranking 20 psi… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
Mike i have a 2009 Maxxforce dt that shut down completly and
mike i have a 2009 Maxxforce dt that shut down completly and want Start no icp pressure hot or cold. Replaced pucks and ipr. Half the screen was gone on ipr . Dead headed the pump by applying 12v and … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
Have a 2006 International LCF 600 with a 164 128 10 code
Have a 2006 International LCF 600 with a 164 128 10 code replaced ipr replaced icp replaced hpop… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
DT466 4400 series International-no start Have the computer
DT466 4400 series International-no start Have the computer hooked up to it, what do I need to look for?… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
Hard to start, running okay at idle, but idle up and start
hard to start, running okay at idle, but idle up and start running rough and smoke. … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
I have a DT466E with low ICP pressure. New IPR valve, new
I have a DT466E with low ICP pressure. New IPR valve, new HPOP, all 6 new injectors, still low ICP. Pulled new HPOP off and had it bench tested, all good. Any suggestions? … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
3126 cat engine quit going down the road and will not start
3126 cat engine quit going down the road and will not start back, replaced icp sensor, and ipr, these are the codes I'm getting… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
1999 FORD F-550 7.3L production date 6/98 had weak high
1999 FORD F-550 7.3L production date 6/98 had weak high pressure, was only getting 420psi, replaced HPOP no change, applied 12v to the IPR and got 3000psi for a few seconds but went to zero. replaced … read more
Chris (aka-Moose)
Chris (aka-Moose)
Technician
641 satisfied customers
No start on 3126. it is not showing injection control
no start on 3126. it is not showing injection control pressure on scan tool. has flash code 18. i hooked up a manual gauge and it is showing 250 psi while cranking. I dont think the ipr valve is being… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
2003 international 4300 dt466e no icp during cranking have
2003 international 4300 dt466e no icp during cranking have replaced fuel pump and high pressure oil pump replaced reculator and selenoid new icp sensor new cam sensor we have 50 pounds of engine oil p… read more
Alex Olsen
Alex Olsen
auto/diesel/industrial
740 satisfied customers
I have a 1997 international 4900, with the 530 E engine.
Hi, I have a 1997 international 4900, with the 530 E engine. The truck does not run as smoothly as I think it should. When the engine is cold, there is an obvious skip, then when the temp gets up arou… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
2000 GMC topkick with a 3126 cat engine. Shut off while running,
2000 GMC topkick with a 3126 cat engine. Shut off while running, will not restart. Checked voltage to ecm. 12 volts to pins 52 an 53 .I have 1200 psi. pressure in high pressure manifold while cranking… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a cat 3126 that is hiccuping while idling! Sometimes
I have a cat 3126 that is hiccuping while idling! Sometimes it recovers, sometimes it stalls out! And then I can't get it started without ether till it cools down! Tried pulling valve cover and watchi… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 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

6,062 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

10,344 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.

Technician

1,947 satisfied customers

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

< 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