How JustAnswer Works:

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

Ask J.R. Your Own Question

J.R.
J.R., Technician
Category: Heavy Equipment
Satisfied Customers: 7444
Experience:  13 years as warranty technician for Detroit Diesel
13636126
Type Your Heavy Equipment Question Here...
J.R. is online now
A new question is answered every 9 seconds

Mirage: 60 series detroit motor..knocking noise..sensors..vibration

Customer Question

codes shooting 78 and 55 on 60 series detroit motor, getting hard knocking noise in motor, but what could cause poor fuel milage with no internal sensors to cause this, also alot of vibration
Submitted: 5 years ago.
Category: Heavy Equipment
Expert:  J.R. replied 5 years ago.

Section 55.3
Troubleshooting Flash Code 55

The following procedure will troubleshoot Flash Code 55.?

Section 55.3.1
Check J1939 Data Link

Perform the following steps to check for J1939 data link fault.?

Is this a J1939 transmission/engine application?

If yes, contact Detroit Diesel Technical Service.

If no, use programming station and go to "update customer calibration" and select transmission to manual, or correct transmission. Save changes. Refer to "55.3.3 Verify Repairs" .

Section 55.3.2
ECU Code Check

Perform the following steps if code 216/14, missing other ECU displays. This indicates DDEC ECM has lost its connection with other ECU devices and a lost or shorted J1939 data link. ?

If code 86/14 displays also, there is a fault with the smart cruise. Contact OEM for instructions.

If code 84/12 displays, the fault is with the programming of the ECM, or a short exists to the J1939 data link. Contact OEM for VSS (Vehicle Speed Sensor) troubleshooting.

Section 55.3.3
Verify Repairs

Perform the following steps to verify repairs.?

Start engine.

Plug in DDR.

Read codes.

If active codes 216/14 or 231/12 are not logged, troubleshooting is complete.

If active codes 216/14 or 231/12 are logged, contact Detroit Diesel Technical Service. Check DDR software level. Update DDR software if current level is 1.2.

 

 

Section 78.3
Troubleshooting Flash Code 78

For troubleshooting Flash Code 78, follow these procedures:?

For intermittent fault code 86/14, ensure ECM programming is updated to level 32.00 or higher.

If code 86/14 is logged with 216/14, for troubleshooting refer to "55 Flash Code 55 - J1939 Data Link Fault" .

 

Customer: replied 5 years ago.
what about knocking and vibration and i turn motor off and shuts off hard
Expert:  Diesel Pro replied 5 years ago.

HelloCustomer

 

A hard engine knock and vibration is sometimes caused by too much fuel from injector or internal engine damage. Check your oil and smell it, to check for fuel in the oil (bad injector) or check for water in oil (internal engine damage). If every thing is good, have your technician check your engine computer and harness for defects since you have a code 55.

 

If you are satisfied with my answer, please press the accept button to process payment, If not, let me know how i can help.Thanks.

 

Diesel Pro

Expert:  J.R. replied 5 years ago.
The knocking etc can be caused by the ecm not performcorrectly if it is not sending the correct readings to injectors etc. I would suggest that you take it in to a dealer to have the ecm checked out.
Customer: replied 5 years ago.
i did 2 o.a.'s waiting on one to come back 1st one said had coolant in it, they said level in it was fine, not a concern
Expert:  J.R. replied 5 years ago.
Who did you have do the oil analysis? Do you remember what the level was at? You may have some cavitation to the injector tubes.
Customer: replied 5 years ago.
.03% coolant in oil and fl of utah
Expert:  Diesel Pro replied 5 years ago.

HelloCustomer

 

I forgot to mention, did you have a cylinder cut out test done? This would pin point your bad cylinder if any? some water in the oil would be a concern. I would have engine pressure checked to verify.

 

Let me know if this info helped. Thanks.

 

Diesel Pro

Expert:  J.R. replied 5 years ago.
The .03% is nothing to worry about. Levels that are that low could be caused by condensation. I would take in and have it checked out by your local f/l or detroit diesel dealer and they will get you taken care of.

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:

 
 
 
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • 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
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka - Moose)

    Technician

    Satisfied Customers:

    112
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka - Moose)'s Avatar

    Chris (aka - Moose)

    Technician

    Satisfied Customers:

    112
    16 years of experience
  • http://ww2.justanswer.com/uploads/Boxerman1969/2009-06-22_213107_ja_avatar.JPG Tim's Avatar

    Tim

    Foreman

    Satisfied Customers:

    338
    23 Years Heavy Equipment and Truck Repairs Shop and Field in the Minning and Construction Industry
  • http://ww2.justanswer.com/uploads/jrwhitey2000/2009-01-03_193237_me.jpg J.R.'s Avatar

    J.R.

    Technician

    Satisfied Customers:

    148
    13 years as warranty technician for Detroit Diesel
  • http://ww2.justanswer.com/uploads/yellowman99/2010-03-20_033822_Marshall_Pete_Furr.jpg Cat Man's Avatar

    Cat Man

    Caterpillar Engine Expert

    Satisfied Customers:

    3706
    23 Years Caterpillar Engine experience.
  • http://ww2.justanswer.com/uploads/WT/wtolkson/2012-6-8_12723_JApicture2012.64x64.jpg Wayne's Avatar

    Wayne

    Journeyman

    Satisfied Customers:

    3017
    34 years experiance as engine rebuild and problems.Thermo-King repair and trouble shooting.
  • http://ww2.justanswer.com/uploads/cumminsdr/2010-7-20_204410_ja.jpg DR.Cummins's Avatar

    DR.Cummins

    FIELD SERVICE TECHNICIAN

    Satisfied Customers:

    2352
    16 Years working on Cummins Diesel engines,
  • http://ww2.justanswer.com/uploads/KO/koboma/2012-6-6_20917_DSCF1022.64x64.JPG Curtis B.'s Avatar

    Curtis B.

    service manager

    Satisfied Customers:

    2226
    30 years exp. with diesel engines, heavy equipment and forklifts, including lp forklifts