1. The Loud Fuel Pump:
* Location: The fuel pump is located inside the fuel tank, typically submerged in the fuel. You won't be able to access it without dropping the fuel tank. This is a significant undertaking, requiring some mechanical skill and specialized tools.
* Causes of Loud Noise: A loud fuel pump often indicates it's failing. The pump itself might be wearing out (bearings, impeller), or there might be debris in the fuel system causing it to work harder. A restricted fuel filter is another possibility. A whining sound might point to a lack of lubrication.
* Troubleshooting (Before Replacement): Before resorting to a costly tank drop and pump replacement, try these:
* Check the Fuel Filter: This is the easiest and cheapest first step. A clogged filter restricts fuel flow, making the pump work harder and creating noise. It's relatively easy to access and replace (location varies slightly by year; consult your repair manual).
* Fuel Pressure Test: This requires a fuel pressure gauge and some knowledge of where to connect it (check a repair manual). A low fuel pressure reading confirms a problem with the fuel pump or other parts of the fuel system.
* Replacement: Replacing the fuel pump typically involves:
* Lowering the fuel tank: This requires disconnecting fuel lines (carefully!), electrical connectors, and tank straps. SAFETY FIRST: Always disconnect the negative battery terminal before working near fuel. Also, allow the fuel system to depressurize.
* Removing the old pump: Access to the pump varies by car model; consult a repair manual.
* Installing the new pump: Ensure the new pump is correctly seated and all connections are secure.
* Raising the fuel tank: Be careful not to damage the fuel lines or tank.
* Re-connecting everything: Double-check all connections and carefully prime the new pump (method varies depending on the car; consult your repair manual or a professional mechanic).
2. Hard Starting in the Morning:
This issue, combined with the loud fuel pump, suggests a few possibilities:
* Weak Fuel Pump: A failing fuel pump might deliver insufficient pressure to start the engine easily, especially when the engine is cold.
* Fuel System Leaks: A leak in the fuel system will cause a loss of fuel pressure overnight, making it harder to start in the morning.
* Clogged Fuel Filter (Again): This is a major culprit in hard starting.
* Battery Issues: A weak battery or failing alternator can prevent sufficient cranking power to start the car, particularly in cold weather. Get the battery and charging system tested.
* Ignition System Problems: Issues with the ignition coil, distributor (if equipped), spark plugs, or wires can prevent the engine from starting.
Recommendation:
Given the combined issues, I strongly recommend taking your car to a qualified mechanic. Replacing a fuel pump is a fairly complex job, and incorrect installation can lead to serious problems (fuel leaks and fire hazard). The mechanic can diagnose the exact cause of the loud pump and hard starting and perform the necessary repairs safely and efficiently. Attempting to work on fuel systems without proper experience can be dangerous.
