Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

I'm trying to help my husband He has a Kenworth with Detroit…

I'm trying to help...

I'm trying to help my husband He has a Kenworth with Detroit engine. Truck will be running fine and then speedometer goes to zero something about 1500 rpm and check engine light comes on. He went to a Kenworth dealer but they don't work on Detroit engines anymore

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

Thanks

Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 44 minutes by:
9/18/2017
spankyjr1
spankyjr1, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 2,686
Experience: I worked on all types of equipment semis,forklifts,farm,ect.
Verified

Hi, my name is ***** ***** for your question.I'm reviewing your question now, and will post back with your reply ASAP.

Ask Your Own Medium and Heavy Trucks Question

When the engine looses speed signal it de-rates engine to 1500 RPM to keep guys from bypassing any speed limiter settings programmed into ecm

This does tell us it's a signal issue from the VSS (vehicle speed sensor) The sensor is located on back of transmission by driveshaft and can be replaced easily (replace VSS)

Just remove and install a new sensor,, screw new sensor in all the way then back off 1/2 turn and lock down nut

This should take care of check engine light and keep engine from not going above 1500 RPM

**********Please don’t forget to rate or accept the answer in a positive way, .**********
EVEN IF YOU HAVE A SUBSCRIPTION ****THAT IS THE ONLY WAY I GET PAID ****
You may still ask follow up questions at no extra charge after rating.
Thank You

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 9 months ago
He already did that and changed speedometer/odometer head. He did tell me it's a T2000

Make sure yoke on back of transmission is tight,, if loose it allows drive ring for speedometer to slip so sensor does not read correctly

The only other thing would be a wiring issue from VSS to engine computer (ECM)

It's a two wire harness he can follow from VSS to ECM and check for any rubbed out spots along frame, transmission, or engine or corrosion in plugs

Repair, clean, or replace as needed

If he wants to do a phone call I can send a offer for extra service just let me know if that would help?

Please use the star rating system at top of page so I get credit from the web site for my time,
You may still ask follow up questions at no extra charge after rating.
Thank you

spankyjr1
spankyjr1, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 2,686
Experience: I worked on all types of equipment semis,forklifts,farm,ect.
Verified
spankyjr1 and 87 other Medium and Heavy Trucks Specialists are ready to help you
Ask your own question now

Thank you for the positive rating very much appreciated.
Please come back again you may ask for me if you like.
Take care
spanky

Ask Your Own Medium and Heavy Trucks Question
Was this answer helpful?
Ask spankyjr1 Your Own Question
spankyjr1
spankyjr1
spankyjr1, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 2,686
2,686 Satisfied Customers
Experience: I worked on all types of equipment semis,forklifts,farm,ect.

spankyjr1 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

2,322 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

4,247 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

2,640 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,019 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

1,225 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

813 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 causes cumbstion soot to be on a 60 series injector.
What causes cumbstion soot to be on a 60 series injector … read more
Curtis B.
Curtis B.
Technician
Associate Degree
813 satisfied customers
I have isuzu nnr 2014 abs light and brake light is on whit a
i have isuzu nnr 2014 abs light and brake light is on whit a fault code c0261 any idea? … read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
Have a 1993 L783 with Ford 201 three cylinder engine with
Have a 1993 L783 with Ford 201 three cylinder engine with engine oil in the coolant. Had head checked and resurfaced and still have same problem otherwise engine runs fine. 45 minutes will lose about … read more
Curtis B.
Curtis B.
Technician
Associate Degree
813 satisfied customers
Checking AC 2006 IH 9400i where is relay for compresser in
Checking AC 2006 IH 9400i where is relay for compresser in fuse box there is no location diagram … read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
I have a 2003 Kenworth T300 and my “high water” code light
I have a 2003 Kenworth T300 and my “high water” code light just came on and it is beeping .. … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,640 satisfied customers
We have a Skyjack SJ111 3219 and it wont go up, it will
Hi we have a Skyjack SJ111 3219 and it wont go up, it will drive forward and backwards, we kept trying one day and it went up a little then wouldnt come down, keep trying and it finally went down and … read more
Curtis B.
Curtis B.
Technician
Associate Degree
813 satisfied customers
1995 Peterbilt n14 Cummins the speedometer quit put new
1995 Peterbilt n14 Cummins the speedometer quit put new sensor and gauge in still not reading checked wires and all ohm out any solution? … read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
2011 Durastar 4300. dtc 2335 store. hard start - just
2011 Durastar 4300. dtc 2335 store. hard start - just replaced fuel rail o rings and all 6 injectors. Ran great just after injectors replaced - but after sitting overnight problem back. … read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
I want to replace my injectors on my 950f cat wheel loader.
I want to replace my injectors on my 950f cat wheel loader. It has 3116 engine … read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
I have a 170 allis and I need to know where each spark plug
I have a 170 allis and I need to know where each spark plug wire goes . both ends … read more
Curtis B.
Curtis B.
Technician
Associate Degree
813 satisfied customers
I have a 252b it starts and drives as it should, i dont have
I have a 252b it starts and drives as it should, i dont have auxiliary hydraulics just one day it stopped tilting and up down functions … read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
I am working on a 2005 Cummins ISC240, i need torque for
I am working on a 2005 Cummins ISC240, i need torque for inframe. Head, Injectors, Rods and Mains … read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,225 satisfied customers
Tri Pac won't start. 2009 Volvo 780 with d16. And have hit
Yes and have hit the reset switch and it the s o we but doesn't start … read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
I recently have notice my brakes have been acting a little
I recently have notice my brakes have been acting a little differently. (Ford Explorer 2007). (I hjave to press down a little harder and/or sometimes the brakes feel a little mush). I plan to have a b… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,640 satisfied customers
I have a check engine and solid yellow engine light on a
I have a check engine and solid yellow engine light on a 2013 Freightliner cascadia. Dd13.. sensor is EEC 61. Fault 1. Fail 5. SPN 4354... I did look at the line heater #1 and it was a tear in the blu… read more
roy
roy
Associate Degree
3 satisfied customers
Robbed 200lc with cummins. runs fine for awhile then will
robbed 200lc with cummins. runs fine for awhile then will stall under load at lower rpm. the problem is that it won't start again for a few days. turns over with lots of black smoke though so it looks… read more
Jackie Dempsey
Jackie Dempsey
Heavy Line Technician
Automotive and Diesel Engines
94 satisfied customers
2009 international prostar 56 in sleeper, how many lb of
2009 international prostar 56 in sleeper, how many lb of refrigerant for ac from vacuum to fill up will take… read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
I have a PC 18 MR-2 and I'm wondering what the small lines
I have a PC 18 MR-2 and I'm wondering what the small lines going to the final drive motors are for. As well do they have a lot of pressure in them, what would happen if I put a splice in one as it has… read more
Curtis B.
Curtis B.
Technician
Associate Degree
813 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