1. Check for Priming Mechanisms:
* Manual Priming Pump: Some Sprinters have a manual priming pump (often a small lever or button) near the fuel filter. If you have one, pump it repeatedly until you feel resistance, indicating the system is full.
* Electric Fuel Pump: Many Sprinters rely on an electric fuel pump. You might need to cycle the ignition switch (turn the key to the "on" position, but don't start the engine) several times to allow the pump to build pressure. Listen for the whirring sound of the fuel pump – this confirms it's working.
2. If you have neither a manual pump nor hear the electric fuel pump: Check your fuses, as a blown fuse could prevent the pump from working.
3. Cranking the Engine:
After priming the system, try to start the engine. It might crank for a few seconds longer than usual before starting, as the system builds pressure.
4. If it doesn't start:
* Check for air in the lines: If you suspect air is still in the fuel lines, you might need to repeat the priming process. Persistent airlocks can sometimes require bleeding the fuel system, a more involved process that might require professional assistance.
* Verify the filter is installed correctly: Ensure the filter is seated properly and the fuel lines are connected securely without leaks. A wrongly installed filter will almost certainly prevent starting.
* Check the fuel level: Make sure your fuel tank actually has fuel! Seems obvious, but it's an easy oversight.
* Consult your Sprinter's repair manual: Your owner's manual or a service manual specific to your Sprinter's year and engine will provide the most accurate and detailed instructions.
Important Note: If you're uncomfortable performing this task, it's best to have a qualified mechanic handle the fuel filter replacement. Improperly installing the filter or failing to prime the system correctly can cause damage to the fuel injection system.
