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 Rudolph Diesel Your Own Question

Rudolph Diesel
Rudolph Diesel, ASE ,Master Heavy Truck Technichian
Category: Heavy Equipment
Satisfied Customers: 1793
Experience:  25 YEARS OF HEAVY EQUIPMENT REPAIRS
Type Your Heavy Equipment Question Here...
Rudolph Diesel is online now
A new question is answered every 9 seconds

Allegro Bus with a cummins 8.3...time the stop engine light comes on

Customer Question

I have a Allegro Bus with a cummins 8.3. From time to time the stop engine light comes on. It is very quick and goes right out. What triggers this light?
Submitted: 5 years ago.
Category: Heavy Equipment
Expert:  Rudolph Diesel replied 5 years ago.

Hello

Welcome to JA!

Here is what will trigger the light.

low coolant

low oil

high coolant temp

high oil temp

low oil presser

id go threw check the fluid levels

if there is good oil presser and fluids are full

then

 

 

Most of the time its a faulty low coolant level switch

i would go threw and unplug then plug in the sensors and switches

 

Let me know if i can help more!

Hart

Rudolph Diesel, ASE ,Master Heavy Truck Technichian
Category: Heavy Equipment
Satisfied Customers: 1793
Experience: 25 YEARS OF HEAVY EQUIPMENT REPAIRS
Rudolph Diesel and other Heavy Equipment Specialists are ready to help you
Customer: replied 5 years ago.
The answer I recived is not right and I need to ask again and add some more info.
Expert:  Rudolph Diesel replied 5 years ago.

Ok

How can i help you.

Hart

Customer: replied 5 years ago.
Ok I made sure all fluids were full, and bypassed the coolant level switch. The alarm continues to go off. I obsereved this weeked that it sounds when excelerating whe climbing a hill or hard excelleration from a dead stop. The alarm goes of when letting off of the throttle. I wonder about fuel pressure problem?
Expert:  Rudolph Diesel replied 5 years ago.
Give me 10 minn ill see if the fuel system will trigger the buzzer
Expert:  Rudolph Diesel replied 5 years ago.

Hi there is nothing on the fuel system to tiger a warning buzzer

is there a sensor on the oil pan?

 

Hart

Customer: replied 5 years ago.
I do not know, but the Stop Engine alarm reacts to the throttle and a sensor on the oil pan would not react that quickly. I wonder about air flow to the intake, maybe dirty air filter?
Expert:  Rudolph Diesel replied 5 years ago.

The only thing other then my original posting on the trigger of the alarm would be the TPS throttle possion sensor, But there showing a hard code with the buzzer and light,

Could very well be a intermittent problom so it wont hold a code.

Hart

Customer: replied 5 years ago.
Yes the light and buzzer come on.
Expert:  Rudolph Diesel replied 5 years ago.

My wording was wrong on that sorry

yes on the buzzer and light but a check engine light would stay on even with the buzzer off, ,,,,,,,,,,,,,, but if its a intermittently problom like the brass contact on the TPS then i don't think it will hold a code, I would check that.

Hart

Customer: replied 5 years ago.
I dont think it can be an intermittent problem as it always stops when I get off the throttle.
Expert:  Rudolph Diesel replied 5 years ago.

If it were a hard code for the tps it would have a check engine light on all the time.

and have a code showing 33-145,

A soft code is when it don't last long enough to store in the ecm example is a bad spot on the brass on the ecm so at a certain time during throttle presser it will flash a check engine light and buzz, when you move the peddle it changes the voltage on the tps so all you get is a quick flash of a code,

Hart

Customer: replied 5 years ago.
Ok Thank you
Expert:  Rudolph Diesel replied 5 years ago.

Let me know if your still having problems!

Hart

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