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I have a 5.9 cummins 2004 3500 the truck will not go

Customer Question
I have a 5.9...

I have a 5.9 cummins 2004 3500 the truck will not go over2000 rpm going down the road but will in park

Mechanic's Assistant: What is the complete model and serial number of your machine?

I will get it

Mechanic's Assistant: Are you fixing this yourself? What have you tried so far?

Yes

Mechanic's Assistant: Anything else you want the equipment mechanic to know before I connect you?

Model rpc ser #3d7ma48cx4g140875

Submitted: 4 months ago.Category: Medium and Heavy Trucks
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Answered in 8 hours by:
12/8/2017
Technician: Curtis B., Technician replied 4 months ago
Curtis B.
Curtis B., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 30,074
Experience: Technician turned service manager on multiple lines of trucks and engines, used in industry.
Verified

Welcome to JUST ANSWER heavy equipment. With years of experience, I look forward to doing my best to help.

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Technician: Curtis B., Technician replied 4 months ago

2004 would be a mechaical injection pump, not electronic. Have changed the fuel filters and checked the flow to the injection pump from the filter? I see this as a fuel supply problem, where it has plenty of fuel to get maximum rpm with no load, but not enough fuel for the engine to develop horsepower and rpm at highway speeds.

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Technician: Curtis B., Technician replied 4 months ago

I see the question is still open, did you find the problem?

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Curtis B.
Curtis B.
Curtis B., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 30,074
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Experience: Technician turned service manager on multiple lines of trucks and engines, used in industry.

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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.

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