How to Turn Fuel up On N14 Cummins | Follow These 10 Steps

How to Turn Fuel up On N14 Cummins

N14 Cummins Fuel Filters With parts and supplies from Diesel Parts, you can keep Cummins N14 Series engines working smoothly and effectively. The world is dirty, and replacing the fuel filter on the Cummins N14 regularly will protect the diesel fuel pumps, injectors, and injectors from abrasive particles.

How to Turn Fuel up On N14 Cummins

How to Turn Fuel up On N14 Cummins
  • Install the gasoline pump, the spider coupling, and the mounting gasket.
  • Tighten the cap screws that hold the pump in place.
  • The gear siphon channel tube, the gas supply hose, and the fuel rail supply cylinder should be connected in every way. 
  • Attach the fuel pump’s driving spider to the fuel pump.
  • Install the gasoline pump with a new gasket.
  • Install the four cap screws that hold the fuel pump in place.
  • Reconnect the air signal line and fuel tube on the AFC. As a result of its additional weight, the PT PACER siphon requires a mounting support section on the fuel siphon and engine block in motors that uses it.
  • To guarantee adequate gasoline pump mounting gasket performance, the PT PACER pump support bracket is necessary.
  • Tighten the fuel pump and engine block cap screws alternately and after installing the bracket.
  • Also, the usual operating turn-up fuel for the N14 is ten psi (Idle), 25 psi (1200 RPM) – Fuel pressure is 25 psi (Cranking), 120 psi (1200 RPM) – 20 pounds per square inch at 1,200 RPM.

How to Clean the Fuel Filter on Duramax

The Duramax fuel filter is found in the engine compartment on the passenger side, near the bulkhead and adjacent to the battery. Because of its location, men with larger hands have to think to lean in to get a filter handle.

Removing the plastic insert from the fender recess is the easiest way to expose the filter, as it is held by only about 14 plastic latches and takes only a few minutes to remove.

The uniqueness of the Duramax fuel filter is the integrated water-in-fuel sensor, which also includes a water drain valve. This sensor must be disconnected from the vehicle wiring harness before the filter is rotated, and a special key is required to remove and install the sensor.

Replacement filters will provide two new O-rings: one for the sensor baffle and one for the filter sealing surface, both of which must be lubricated with petroleum-based grease before installation.

Once the new filter is connected to the truck, it’s time to fill the filter. For Duramax, the filling is done by first opening the safety valve (with a 1/2-inch wrench or flat-blade screwdriver) and then manually pressing the base pump on top of the filter housing.

After venting all air from the filter, the safety valve should be closed, and the process is complete.

How to Replace the Fuel Filter on Power Stroke?

How to Turn Fuel up On N14 Cummins

The Power Stroke engine family is the most unique in terms of not only the type and location of the fuel filter but also the quantity. While Duramax uses a single sealed spin-on filter and Cummins a single cartridge, Fords equipped with 6.0-liter, 6.4-liter, and 6.7-liter engines receive two cartridge filters (7.3-liter engines use a single cartridge.)

The primary filter is located approximately in the middle of the chassis along the driver’s frame rail. Brake lines and wiring harnesses may be a problem depending on the year. For ’03 and newer models, there is a secondary filter on the top of the engine.

Replacing filters is a relatively simple task. The first step is to drain the filter using the water drain valve. While the procedure is the same, the drain valve is different for each engine model. After depleting the fuel, the canister cap can be eliminated, and another channel introduced.

Don’t forget to replace the old O-rings with the supplied ones. The secondary filter is replaced in the same way for the 6.0L and 6.4L engines. Remove the plastic cap and replace the filter cartridge and O-ring.

Unlike the previous cartridge-type secondary filter, the 6.7L uses a sealed cartridge, which is replaced as a unit. Loosen the set screw and remove the two fuel line quick connectors to replace them. After completing these steps, the device is lifted and removed. To quickly find out if a filter has ever been replaced, look for a third nipple that is only on the original factory filter.

To fill the fuel system, turn the key 10 to 20 times without starting the engine. This allows the vehicle’s low-pressure fuel pump to refill the new filters and bleed the system.

Frequently Asked Questions

What is the exhibition of the N14 Cummins?

The Cummins N14 can deliver somewhere in the range of 310 and 525 drive, contingent upon the super-size chosen by the vehicle maker. It is additionally equipped for producing 1,250 to 1,850 ft-pounds of force at 1,200 pm.

When did Cummins quit using the N14 motor?

Based on the 855 cubic inch Cummins base motor, the N14 was produced from the last part of the 1980s until 2000, when it was ended and supplanted by various ISX motors. The N14 has had several minor updates over the years but has essentially stayed the same. 

Where is the fuel pressure check valve?

The mechanical fuel pump has a check valve with two ports, one at the pump inlet and one at the outlet. The check valve is intended to guarantee that fuel in the vehicle streams in the right bearing from the fuel siphon and keeps up with pressure.

What is the motivation behind checking the fuel channel valve?

Fuel check valves are introduced in the fuel line. They only allow fuel to flow in one direction and prevent pipes from drying out.

Is the Cummins N14 a decent motor?

The Cummins N-14 is an extraordinary motor, most likely the best Cummins motor made. These motors are the things that make dreams work out as expected, assuming you’re an older-style fellow searching for unwavering quality. The N14 motor is the replacement for the extremely well-known Cummins 855 Big Cam, which was created in 1976 and 1985.


The Cummins N14 is a popular diesel engine widely installed in commercial trucks. The easiest way to increase fuel is to install a gauge on the fuel pump and monitor the engine pressure. Most likely, the motor will start as soon as the pump builds up pressure.