Regan Brown
If you want to bleed the fuel filter on your 99 Dodge Ram, you've come to the right place. This process can be done on your own, but it is important to be cautious and aware of the risks. This guide will take you through the steps to bleed your 99 Dodge Ram fuel filter, including replacing the filter, bleeding air from the injectors, and priming the fuel system. It is recommended to refer to a Dodge Ram repair manual for detailed instructions and diagrams specific to your vehicle.
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What You'll Learn
The fuel filter is in a metal canister
The fuel filter on a '99 Dodge Ram is located inside a metal canister, which is positioned within the fuel tank. This canister is an important component of the fuel system, as it houses the fuel filter and plays a role in maintaining fuel pressure and supply to the engine.
To access the fuel filter for maintenance or replacement, one must first locate the canister. It is positioned near the fuel tank, typically on the driver's side of the vehicle, close to the rear axle. The specific location can vary slightly depending on the model and configuration of your Dodge Ram, so consulting a service manual or seeking advice from a qualified mechanic can be helpful if you're unsure.
Once you have located the metal canister, the next step is to safely relieve the fuel system pressure. This is a critical step to avoid any accidental spills or injury. Ensure the engine is off and locate the schrader valve, typically found on the fuel rail. Depress the valve to release any residual pressure in the lines.
With the pressure relieved, you can now focus on the canister itself. It is secured by several bolts or clamps, which need to be carefully removed. Place a container beneath the canister to catch any residual fuel that may spill. Once the bolts are removed, carefully lift the canister out, being mindful of its weight and any remaining fuel.
Inside the canister, you will find the fuel filter. It is cylindrical in shape and typically white or light-colored. It may have a black cap on one end, which is the fuel outlet. Carefully remove the filter, taking note of its orientation for proper installation of a new filter. Now you can proceed to install a new fuel filter or perform any necessary maintenance.
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Undo the nut at the top of the canister
To undo the nut at the top of the canister, you will need either a 14mm or 15mm spanner. Undo the nut carefully, as the entire fuel filter canister will drop out from below once the nut is removed. Once the nut is undone, take the canister to a bench or clear surface to continue working.
It is important to be cautious when performing any vehicle maintenance, and ensure you are wearing appropriate safety gear, such as gloves and eye protection. Additionally, it is always a good idea to refer to your vehicle's service manual for specific instructions and safety precautions.
Once the canister is secure on your workbench, you can proceed to the next steps of replacing the fuel filter. This includes replacing the O-rings, of which there are three. You may also choose to fill the canister with diesel fuel or a marvel mystery mix. Be sure to close the drain and clean the inside of the canister with a clean cloth.
After you have completed the necessary maintenance on the canister, you can reinstall it by reversing the steps outlined above.
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Replace the filter and o-rings
To replace the filter and O-rings, first undo the nut at the top of the fuel filter canister; it will be either a 14mm or 15mm nut. Once the nut is undone, the entire canister will drop out from below. Take it to a bench and replace the filter and O-rings. There are three O-rings to replace.
You can fill the canister with diesel fuel or a marvel mystery mix. Make sure to close the drain and clean the inside of the canister with a clean cloth. Once you have replaced the filter and O-rings, put the canister back into the truck.
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Reinstall the canister and turn the key in the ignition
Once you have cleaned the inside of the canister with a clean cloth and ensured that the drain is closed, you can reinstall the canister. Put the key in the ignition and turn it, but do not start the engine. This will activate the lift pump, which should run for around 30 seconds.
It is important to note that you should not start the truck at this stage of the process. Simply turn the key in the ignition and allow the lift pump to run. Once the lift pump has stopped running, you can turn the key off and then back on again. You can then bump the starter a second time. Again, do not start the truck.
After bumping the starter for the second time, the lift pump will run for another 30-45 seconds. Once it stops running, you can start the truck. It is normal for the truck to run for only a few seconds and then die. If this happens, crank the engine for 10 seconds and then wait for 20 seconds. Repeat this process until the truck runs smoothly. It usually takes around three cycles of cranking for the truck to run properly.
Some people choose to repeat the process of turning the key in the ignition and bumping the starter three or more times to ensure that all air is purged from the filter.
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Crank the engine and bleed the injectors
To crank the engine and bleed the injectors of your 1999 Dodge Ram, follow these steps:
First, ensure you have the necessary safety equipment. Wear safety goggles and adequate protective clothing to avoid contact with fuel spray when bleeding high-pressure fuel lines. Have a fire extinguisher and safety glasses on hand as well.
Now, to the procedure:
- Bump the starter without cranking to cycle the fuel pump for 30-45 seconds. Do this a couple of times to refill the fuel filter bowl.
- Loosen the injector nuts on the engine cylinders. You can use a 19mm or 3/4 inch box wrench to loosen the #1, 3, and 4 injector nuts. Count from the front to the back, and loosen them about 3-4 turns.
- Crank the engine for about 15-20 seconds.
- Observe if fuel is coming out of the injector fittings. If no fuel is present, it may indicate a problem with the VP-44.
- Tighten the injector nuts.
- Start the truck. The engine will initially run rough because it is starting on three cylinders.
- Continue bleeding the injectors until the engine runs smoothly. This may take a few minutes.
- Tighten the fuel lines at the injectors to 38 Nm (28 ft-lbs) torque.
Some additional tips:
- It is beneficial to have a battery charger capable of charging at least 40 amps to ensure the engine is cranking fast enough for the internal valving in the pump to bleed.
- If you are working with a completely empty fuel tank, the fuel injectors must be bled as the fuel injection pump is not self-bleeding.
- You can also crack open the nuts on the 2nd and 3rd cylinders, crank the engine, and then tighten them back down. This method will make a mess, but it is effective.
- To clean the injectors, you can use a jewellery sonic cleaner with mineral spirits as a solvent, or a solvent-based cleaner.
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Frequently asked questions
The fuel filter is located in a metal canister. Undo the nut at the top (either 14mm or 15mm) and the entire canister will drop out from below.
Drop the canister, replace the filter and O-rings, and fill the canister with diesel fuel. Make sure to close the drain and clean the inside of the canister with a clean cloth. Then, reinstall the canister.
Put the key in the ignition and turn it, but do not start the truck. This will make the lift pump run for 30 seconds. Repeat this process until the truck starts, which may take 3 cycles of cranking.
It is important to bleed the injectors in sequence: 3, 4, and 5. Loosen (do not remove) the high-pressure fuel line fittings at these cylinders and continue bleeding each injector one at a time until the engine runs smoothly.
