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go-west..
go-west.., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 1185
Experience:  Technican with 20 years experience focused on engines and electrical.
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Bad fuel mileage on n14 Cummings new air and fuel filter

Customer Question

Bad fuel mileage on n14 Cummings new air and fuel filter
Submitted: 10 months ago.
Category: Medium and Heavy Trucks
Expert:  go-west.. replied 10 months ago.
Good morning
What are you getting for fuel mileage right now?How does it run?Are there any check engine lights?
Customer: replied 10 months ago.
5.4 to 5.6 mpg runs good pulls strong no cel
Expert:  go-west.. replied 10 months ago.
Sorry for the delay
I've heard of this on occasion but when the injectors start to wear the orifices on the injector tips start to get bigger thus more fuel is burnt. But who wants to buy new injectors if she's running good
So the only suggestions I have is keep it under 55 mph and shift sooner to keep the rpms down
Let me know how if you have any other questions
Customer: replied 10 months ago.
Can I tell if I pull the injector out
Expert:  go-west.. replied 10 months ago.
No we are talking thousands of an inch
Seems small but makes a difference
Customer: replied 10 months ago.
Ok
Expert:  go-west.. replied 10 months ago.
Let me know if you have any other questions

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