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 DR.Cummins Your Own Question

DR.Cummins
DR.Cummins, FIELD SERVICE TECHNICIAN
Category: Heavy Equipment
Satisfied Customers: 3089
Experience:  16 Years working on Cummins Diesel engines,
28984014
Type Your Heavy Equipment Question Here...
DR.Cummins is online now
A new question is answered every 9 seconds

New injector in a commins n14 was missing like injector..running BAD

Customer Question

new injector in a commins n14 was missing like injector not working properly replaced and still running BAD?
Submitted: 2 years ago.
Category: Heavy Equipment
Expert:  brian replied 2 years ago.

brian :

hello what all have u tried?

Customer:

put a new injector into #4 cylinder

Customer:

hello is there anyone available

brian :

did the ecm tell u it was number 4?

Customer:

hello can u give me some answers

Customer:

yes

brian :

did the code go away after u replaced it?

Customer:

we did not have a meeter to check the code

brian :

ok,how did u figure out #4 was the bad inj

Customer:

disconected the wire and truck ran same , disconect wire 3 & 5 truck ran worse so i figer number 4 was not fireing

brian :

that is a good way to ck it,what does it do now when u diconnect the wire?

Customer:

some times its worse sometimes its not

brian :

have u cked for bent push rods or broke or outta adjustment intake and ex valves on #4?

Customer:

yes

brian :

how about proper voltage to the inj?

Customer:

whats the best way to check voltage

brian :

with the truck running unplug the plug o the inj and ck it using a multimeter not a test light

Customer:

how much voltage should i have

brian :

another thing to ck for is with the truck running, visualy look and see if the int and ex rockers are moving up and down the same height compared to the others.

Customer:

thats already ben done

brian :

should have 12.50 and above,some of the newer ones run 110v and up,

Customer:

well work on it again tmrw , thanks for your input

brian :

yw

Expert:  DR.Cummins replied 2 years ago.
Hello and welcome to Just Answer! I would be more than happy to assist you today.The voltage is check is un needed as the ecm would of set a fault for that cylinder .the injector solenoid valves are actuated by the electronic control module (ECM) to control fuel metering and timing. Each injector solenoid is connected to the ECM by a supply and a return wire. An electrical pulse is sent to the injector from the ECM on the supply wire and returns to the ECM on the return wire, after actuating the solenoid. Each solenoid valve is normally open, and it is only closed by an electrical pulse from the ECM during fuel injection and metering. the best way to check the ecm pulse is with a noid light. so forget that, removing the injector plugs while running is ok but the best way to check for a failed injector it to use a temp gun on the cylinders exhaust port, the lowest temp cylinder is the failed injector. re check the injector setting that you performed the correct adjustment is tighten until the adjusting screw stops on it's own don't force than back out 120 degrees or 2 flats of the adjuster. also a bad engine position sensor will also cause this issue, remove the sensor from the back of the gear housing , check for oil in the connector, a damaged face on the sensor, (bubbles, or cracks are bad) and the sensor should ohm out between 1500-2000 ohms check readings hot and cold. i have seen sensors check good but are bad. your worst case scenario is a failed ecm driver(usually see fault codes for these) try a swap ecm . also re run the entire over head, here is the chart
Expert:  DR.Cummins replied 2 years ago.

The valves and injector are set at the same time

 

A mark -----cylinder 1-6

B mark -----cylinder 5-2

C mark------cylinder 3-4

fireing order is 1-5-3-6-2-4

 

intake valves 14 thousands

exhaust valves 27 thousands

 

Check the valve rocker levers on cylinder number 1 to see if both valves are closed.

Both valves are closed when both rocker levers are loose and can be moved from side to side. If both valves are not closed, rotate the accessory drive one complete revolution; and align the "A" mark with the pointer again.

 

FYI--------- The Cummins N14 was discontinued around 2000, and has been replaced by the Cummins ISX !!So there are no Newer N 14............. ALSO

The injector solenoids receive high voltage when the engine is operating, do not touch the injector solenoids or the solenoid wires when the engine is operating. This can result in electrical shock that can cause personal injury or death. Your choice to check for voltage ...........

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