Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Ask an Expert,
Get an Answer ASAP!

I have a freightliner with a cat c7 engine, will not start.

Customer Question
I have a freightliner...

I have a freightliner with a cat c7 engine, will not start. Turns over fine. Power and ground at ecm. Flash codes are 58. Cat et shows cold start and no engine speed. Replaced speed sensors and fuel regulator. Check engine light cycles on with key but the stop engine light does not come on at all.

Mechanic's Assistant: What's the make/model/year of your truck? Engine type?

2006 freightliner m2 with cat c7. Last 6 of vin is w46705

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

Fuses good. Filters changed. Fairly new injection pump and transfer pump.

Submitted: 4 months ago.Category: Medium and Heavy Trucks
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 1 minute by:
2/17/2018
Technician: Cat Man, Cat Engine Expert replied 4 months ago
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 9,363
Experience: I am ASE Master Truck Certified.
Verified
Thanks for asking your question. I will try and help you out.
Ask Your Own Medium and Heavy Trucks Question
Technician: Cat Man, Cat Engine Expert replied 4 months ago
Since the yellow check engine light comes on, this indicates the engine ECM is receiving power and functioning. There are several things that can cause a crank no start on this engine.The first is a low or no fuel pressure condition. The engine needs at least 25 psi to start. If it is low, the injectors will not get filled and it will not start. If the engine has a hand priming pump, and it gets stiff when operating it, the engine has enough pressure to start. If there is no hand priming pump, I would connect a psi gauge and measure the pressure. If the pressure is low, I would change the fuel filters first if you haven’t already. If it is still low, I would suspect a failed fuel pressure regulator on the back of the head or a weak fuel transfer pump. The pump is located on the back of the HEUI pump.Second is a low injection actuation pressure. This is the high pressure oil system that activates the injectors. The engine needs at least 870 psi to start. If it is low, you have either a failed Injection actuation pressure control valve in the HEUI pump, a weak HEUI pump, a high pressure oil leak at an injector, or a faulty Injection actuation pressure sensor. To test the sensor, just unplug it. If the engine starts, the sensor is bad. It has 3 wires and is located on top of the engine near the front and screwed into the head.Third is a failed engine speed timing sensor. Your engine has two. They are located on the driver’s side of the engine on the back of the engines front cover under the HEUI pump. The bottom sensor is the primary start sensor. If it has failed, the engine will be hard to start. The top one is the primary run sensor. They come as a pair.Next is low battery voltage to the ECM while cranking. The ECM must have at least 7.5 volts DC to operate. I have seen weak batteries or a poor connection cause low voltage. You could have a poor connection at the batteries or starter.Next is a faulty engine ECM. The ECM has an injector driver module inside. This is what powers the injectors. If it fails, the ECM will log injector codes for all the injectors.Lastly are worn injectors. Over time the injectors can wear if they have a lot of hours on them. To verify, I like to check AC to the injectors while cranking. You should have between 20-40 AC while cranking. If you do, and you have good fuel pressure, the injectors are worn.Most often when these things are happening there will be diagnostic codes in the ECM. If your engine has cruise control switches, you can pull the codes. If you have never done this, let me know. I can get you the procedure.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 4 months ago
Only code I can get is 5-8. That includes through cat et. There is also no reading on tachometer. Initially there was a no engine speed fault, so I replaced the speed sensors, cleared code and still nothing.
Technician: Cat Man, Cat Engine Expert replied 4 months ago
Thanks for the information.
Code 58 is a J1939 code. It can not keep the engine from starting.
Did the engine just not start one day? Or did it shut down while driving?
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 4 months ago
Not totally sure. Has been running fine, was idling before it this and not sure if it just shut down or if the shutdown timer shut it down, and hasn't fired up since. Also, no exhaust from pipe and no hint of firing with or without starting fluid
Technician: Cat Man, Cat Engine Expert replied 4 months ago
Have you checked fuel pressure while cranking? You could have a bad fuel pump.
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 4 months ago
Right around 20-25psi. I can use the primer pump while turning over and it hits around 40psi. Is there anyway of testing the injection pump? It's only approx 1 year old, don't want to replace if I don't have to.
On a side note, should the stop engine light not cycle on with the check engine light Also?
Technician: Cat Man, Cat Engine Expert replied 4 months ago
Thanks for the information.
That’s plenty of fuel pressure to start.
No the red light should not come on. Only the yellow.
If your not getting an rpm. And you have changed the rpm sensors. Your cam gear may have walked off the camshaft.
I would not suspect the Heui pump as you should have a code for that is it was bad.
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 4 months ago
I won't be back at the truck until tomorrow now.
Technician: Cat Man, Cat Engine Expert replied 4 months ago
Ok. 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 4 months ago
Is the cam gear a press fit? Or would the front cover need to be removed to access?
Technician: Cat Man, Cat Engine Expert replied 4 months ago
the gear presses onto the cam. To access. The front cover would need to be removed.
Ask Your Own Medium and Heavy Trucks Question
Technician: Cat Man, Cat Engine Expert replied 4 months ago
Hey. I just wanted to see how things were going. Please let me know if you need more help. I am happy to assist. If my information was helpful, please leave a good or higher rating so that I receive credit. Thanks.
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: 9,363
9,363 Satisfied Customers
Experience: I am ASE Master Truck Certified.

Cat Man is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

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

2,775 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

9,363 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

2,869 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,235 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

1,337 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

961 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 >

Related Medium and Heavy Trucks Questions
What does the icon of a fuel pump with dashes under it
What does the icon of a fuel pump with dashes under it represent … read more
Steven
Steven
Triage Tech/Shop Foreman
Associates
10 satisfied customers
2011 Isuzu NPR 5.2L diesel —procedure to replace the fuel
2011 Isuzu NPR 5.2L diesel—procedure to replace the fuel pressure limiter and connecting body… read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
An upside-down triangle comes on the dash, the small digital
an upside-down triangle comes on the dash, the small digital readout says ; engine warning, the no accelerator response. so I turn it off for 30 seconds or so, then it starts and runs fine for a few m… read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
I have freighliner 2011 cascadia and show code EEC61 and the
Hi I have freighliner 2011 cascadia and show code EEC61 and the engine light is on what is?… read more
timdieseltech
timdieseltech
diesel tech
Vocational, Technical or Trade School
85 satisfied customers
I have a 2005 GMC with a cat C7 motor. I keep getting code
I have a 2005 GMC with a cat C7 motor. I keep getting code 0108 3spn engine #1 barometric pressure switch voltage above normal or shortage to high source. How do I fix this?… read more
Cat Man
Cat Man
Cat Engine Expert
9,363 satisfied customers
2009 pro star is. With auto shift. The truck goes into
2009 pro star is. With auto shift. The truck goes into limpmode. The code comes up as accelerator pedal. We changed pedal and it still does it? Thaughts… read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
Isx 11.9 2013 425 timing set up. 75005774. Is isx12. My self
isx 11.9 2013 425 timing set up JA: What is the complete model and serial number of your machine? Customer: 75005774 JA: Are you fixing this yourself? What have you tried so far? Customer: is isx12 JA… read more
Steven
Steven
Triage Tech/Shop Foreman
Associates
10 satisfied customers
2013 Volvo d13 code sa 0 spn 411 fmi 7. Volvo vnlVolvo d13.
2013 Volvo d13 code sa 0 spn 411 fmi 7 JA: What's the make/model/year of your truck? Engine type? Customer: Volvo vnl(###) ###-####Volvo d13 JA: Are you fixing your truck yourself? What have you tried… read more
Steven
Steven
Triage Tech/Shop Foreman
Associates
10 satisfied customers
Have a Cummins N14 Celect Plus, Throwing codes PID 036 and
Have a Cummins N14 Celect Plus, Throwing codes PID 036 and PID 021 on truck display. Check engine light is on below 1500rpm but goes off and stays off over 1500rpm? Truck still runs perfectly fine. Wh… read more
Jackie Dempsey
Jackie Dempsey
Heavy Line Technician
Automotive and Diesel Engines
96 satisfied customers
I have 3 fault codes. Son 3363 FMI 26; SPN 3365 FMI 16; and
I have 3 fault codes. Son 3363 FMI 26; SPN 3365 FMI 16; and SPN 1569 SMI 26. I have the software updated last month at the West Palm Beach Cummins facility. Earlier this week I had the sending unit in… read more
roy
roy
Associate Degree
3 satisfied customers
Mileage counter continues to count miles even though I'm
Mileage counter continues to count miles even though I'm parked. … read more
Steven
Steven
Triage Tech/Shop Foreman
Associates
10 satisfied customers
When I push accelerator pedal the engine boggs down and has
when I push accelerator pedal the engine boggs down and has no power … read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
Temporary locked out. Volvo D11. I tried to regen
Temporary locked out JA: What's the make/model/year of your truck? Engine type? Customer: Volvo D11 JA: Are you fixing your truck yourself? What have you tried so far? Customer: I tried to regen JA: A… read more
Steven
Steven
Triage Tech/Shop Foreman
Associates
10 satisfied customers
I have a 2013 cascadia dd13. Cel came on the code is. Eec
I have a 2013 cascadia dd13. Cel came on the code is … read more
FIX-IT
FIX-IT
Comercial transport technician
Vocational, Technical or Trade Scho
784 satisfied customers
How can one check if the blender door is the problem to the
How can one check if the blender door is the problem to the faulty AC in the sleeper?Cascadia DD15… read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
2004 Mack ch613 runs good about 15 miles and then it
2004 Mack ch613 runs good about 15 miles and then it flutters and then it shows 6-4 j1939 and then the fan barely moves in the truck kind of gets warm what could be wrong with it … read more
Steven
Steven
Triage Tech/Shop Foreman
Associates
10 satisfied customers
Could I get the injector height for a 3116 2bk25277. 1992
Could I get the injector height for a 3116 2bk25277 … read more
Cat Man
Cat Man
Cat Engine Expert
9,363 satisfied customers
I'm looking for my cat engine family code. Engine model is
Hello my name is*****'m looking for my cat engine family code … read more
Cat Man
Cat Man
Cat Engine Expert
9,363 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.

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