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My Mack cxu 613 is saying check fuel filter. It is also

Customer Question
My Mack cxu 613...

My Mack cxu 613 is saying check fuel filter. It is also sputtering and occasionally the speed decreases

Mechanic's Assistant: Is the fuel filter an external one, or is it inside the tank?

External.

Mechanic's Assistant: What's the make, model, and year of your car?

Mack cxu(###) ###-####

Mechanic's Assistant: Is there anything else the Mechanic should know before I connect you? Rest assured that they'll be able to help you.

Is it bad for the truck if I continue to run it?

Submitted: 1 year ago.Category: Medium and Heavy Trucks
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Answered in 4 minutes by:
9/7/2021
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,763
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel
Verified

Hello and thank you for using Just Answer. My name is ***** ***** I’d like to try and help. I am sorry that you are having issues with your Mack. I know this can be frustrating. Please allow me a few moments to look over your question and I will be right back with you.

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Customer reply replied 1 year ago
Ok thanks
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago

On your issue, that message and warning is usually due to fuel pressure being lower than desired. This can be caused by plugged filters, aerated fuel, or injectors leaking. If the filters had not been changed recently I would start with that. If that has been done I would look over all the fuel lines for any source of wetness or leaks. If air is getting into the system it is hard on the injectors.

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Customer reply replied 1 year ago
Ok. The filters were recently changed.
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