If your fuel pump isn't working, the problem is likely one of these:
* Mechanical Failure: The pump itself could be worn out, the diaphragm ruptured, or internal parts broken. This requires replacing the fuel pump.
* Camshaft Issues: A worn camshaft lobe that drives the pump could be the culprit. This is a more serious mechanical problem requiring engine work.
* Fuel Line Blockage: A clogged fuel filter or a blocked fuel line could prevent fuel from reaching the pump, causing it to appear not to be working. Check these first.
* Incorrectly Adjusted Pushrod: If the pushrod that connects the camshaft to the pump is not adjusted correctly, the pump won't operate effectively. This is less common but possible.
Troubleshooting Steps:
1. Check for Fuel: Is there fuel in the tank? This sounds obvious, but it's the first thing to check.
2. Check the Fuel Filter: Replace the fuel filter. A clogged filter is a common cause of fuel delivery problems.
3. Listen for the Pump: With the engine running, listen carefully near the fuel pump (it's usually on the engine block near the front). You should hear a gentle whirring or clicking sound. If it's silent, the pump is likely faulty.
4. Check the Fuel Lines: Inspect the fuel lines for cracks, kinks, or blockages.
5. Prime the Fuel Pump (if applicable): Some mechanical fuel pumps benefit from being primed. This usually involves manually pushing the arm of the pump several times to draw fuel into the pump. Be careful, as fuel is flammable and potentially dangerous. A priming tool is available if needed.
6. Check for Vacuum Leaks: A severe vacuum leak may affect the fuel pump's operation indirectly.
7. Replace the Fuel Pump: If you've checked everything else and the pump isn't working, it's likely time for a replacement. This involves removing the old pump and installing a new one, which can be a straightforward job or more involved depending on your mechanical skills.
If you're not comfortable working on your car's fuel system, it's best to take it to a qualified mechanic. Working with fuel can be dangerous, so proceed with caution.
