Medium and Heavy Trucks

Have Truck Repair Questions? Ask an Expert

Ask an Expert,
Get an Answer ASAP!

Medium and Heavy Trucks
This answer was rated:

Have a 6nz cat with 18 speed auto shift, after running

awhile, starting off engine lopes...
have a 6nz cat with 18 speed auto shift, after running awhile, starting off engine lopes and surges till in higher gear range
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 4 hours by:
10/17/2017
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 9,083
Experience: I am ASE Master Truck Certified.
Verified
Thanks for asking your question. I will try and help you out.
Does the yellow check engine light come on when this happens?
Has the fuel pressure been checked when this is happening?
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 3 months ago
Sorry for the delay, No check engine light, no codes.
No fuel pressure check. very erratic.
thx
Thanks for the information.
I would connect a psi gauge to the engine and check the fuel pressure first. If it is fluctuating it can cause your problem.
If the fuel pressure is fine. I would next want to connect a service tool and monitor all sensors. You could have one reading incorrectly cause the problem. When sensors read incorrectly, there often will not be a code.Please reply back if you need more help or have more questions. I am happy to assist.
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 9,083
Experience: I am ASE Master Truck Certified.
Verified
Cat Man and 87 other Medium and Heavy Trucks Specialists are ready to help you
Ask your own question now
Customer reply replied 3 months ago
I will have pressure checked, and scan.
Will let you know.
thx,
Sounds good. 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
Ask Cat Man Your Own Question
Cat Man
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 9,083
9,083 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

2,322 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

9,083 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
Cat C12. I'm doing a timing cover replacement. On the front
Cat C12. I'm doing a timing cover replacement. On the front of the crankshaft gear there is a 2 piece sensor wheel for the crank sensor. I have a motor manual that told me how to remove it, but it doe… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
I have a thermo engine in a sb210 TK486. looking for the
I have a thermo king engine in a sb210 TK486. looking for the head bolt torque settings and pattern. Also wanted to know the rocker arm bolt torque and pattern and the valve gap on the rocker arm. Tha… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,640 satisfied customers
I have a 2013 international workstar 7400 series with air
I have a 2013 international workstar 7400 series with air brakes. The right rear modulator valve is exhausting air with the parking brakes applied. I have change that valve, same problem exist. I have… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,640 satisfied customers
I have a 14 liter detroit putting fuel in coolant what would
i have a 14 liter detroit putting fuel in coolant what would cause that … read more
roy
roy
Associate Degree
3 satisfied customers
Sid 154 fail 05. Mercedes mbe 4000 2010 columbia. Nothing,
Nothing, can't find any codes matching that number in charts etc Yes i have a fleet I fix everything … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Vocational, Technical or Trade School
2,019 satisfied customers
We are looking at a MH with a 1995 Cat 3176. Upon a test
We are looking at a MH with a 1995 Cat 3176. Upon a test drive there is a significant power loss. Very slow acceleration while getting on the freeway. The check engine light is on. I didn't notice any… read more
Cat Man
Cat Man
Cat Engine Expert
9,083 satisfied customers
I have three codes 1569--3216---4094 don't know what they
I have three codes 1569--3216---4094 don't know what they are can you assist … read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,225 satisfied customers
We have a F300SE boom and we want to mount this at the rear
We have a F300SE boom and we want to mount this at the rear of the chassis instead of behind the cab would this be an issue … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
Need hyd. oil pump for 1989 balkahcar mod no GV50HAS, SE
Need hyd. oil pump for 1989 balkahcar mod no GV50HAS … read more
Curtis B.
Curtis B.
Technician
Associate Degree
813 satisfied customers
Looking for torque spec on exhaust manifold for cummins
second opinion] Looking for torque spec on exhaust manifold for cummins ISX15 and sequence … read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,225 satisfied customers
I HAVE A 04 FORD F650 WITH A C7 CAT.WHEN I FIRST START IT UP
I HAVE A 04 FORD F650 WITH A C7 CAT.WHEN I FIRST START IT UP IT SMOKES BAD WITH WHITE SMOKE FOR A WHILE BUT IF I DRIVE IT DOWN THA ROAD IT WILL CLEAR UP.COULD THAT BE A LEAKING INJECTOR… read more
don
don
fleet superintendent
Vocational, Technical or Trade Scho
12 satisfied customers
Battery is full but no gauges inside will come on. 2018
Jump start and reset the power switch at the battery box … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
Could you resend the drop box files here that you sent me
andy, could you resend the drop box files here that you sent me for code p0093. I thought that they would stay active but they are not.… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Vocational, Technical or Trade School
2,019 satisfied customers
Dm1 code is coming up. And machine won't start. Warrior
Dm1 code is coming up JA: What is the complete model and serial number of your machine? Customer: And machine won't start JA: Are you fixing this yourself? What have you tried so far? Customer: Warrio… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
My Mitsubishi Fuso has Engine System light flashing will not
My Mitsubishi Fuso has Engine System light flashing will not go into regen check engine light is flashing as well … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
I have a black spongy material in my radiator. I can squeeze
I have a black spongy material in my radiator. I can squeeze it and its not oily, just clear like water.… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
2003 7.3 powerstroke blowing black smoke when accelerating
2003 7.3 powerstroke blowing black smoke when accelerating and loss of power. New injectors fitted and upgraded garret turbo also fitted. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
I have a 98 Volvo vnl truck with a 60 series Detroit. Trying
I have a 98 Volvo vnl truck with a 60 series Detroit. Trying to replace the starter solenoid while starter is still on truck, but the solenoid only moves forward about 2 inches like its still connecte… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 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