1. Verify the New Fuel Pump Installation:
* Properly Connected: Double-check all electrical connections to the fuel pump. Loose or corroded connections are a common culprit. Ensure the pump is grounded correctly.
* Fuel Lines: Make sure all fuel lines are securely connected, and there are no leaks. A leak before the pump can starve the engine of fuel, even with a good pump.
* Fuel Filter: Did you replace the fuel filter? A clogged fuel filter can prevent fuel from reaching the pump, even if the pump is new. It's a cheap and easy replacement that should always be done during pump replacement.
* Relay: The fuel pump relay controls power to the pump. Check the relay for proper operation. You might swap it with another relay of the same amperage to test. A bad relay will prevent the pump from getting power.
* Wiring: Inspect the wiring harness leading to the fuel pump for any damage or breaks. Look for chafing, rodent damage, or corrosion.
2. Check for Fuel Pressure:
* Fuel Pressure Gauge: Use a fuel pressure gauge to measure the pressure at the fuel rail. This will tell you if fuel is actually reaching the engine. The specifications for the proper fuel pressure are in your owner's manual or a repair manual for your specific 1995 Contour model.
* Pressure Regulator: A faulty fuel pressure regulator could be preventing sufficient fuel from reaching the injectors.
3. Beyond the Fuel System:
* Spark: Does the engine have spark? Check the spark plugs and wires. A lack of spark will prevent the engine from starting regardless of fuel.
* Battery and Alternator: A weak battery or alternator can prevent the engine from cranking or running.
* Ignition System: The ignition switch, ignition coil, and crankshaft position sensor could be faulty and prevent the engine from firing.
* Computer/ECU: In rare cases, a faulty computer (Engine Control Unit or ECU) could be the issue. This is less likely than the simpler problems listed above.
* Immobilizer System (if equipped): Some vehicles have immobilizer systems that prevent starting if they don't detect the correct key.
Troubleshooting Steps:
1. Start with the easy checks: Battery voltage, fuel filter, relay, and all connections.
2. Check for fuel pressure: This is the most crucial step after confirming the pump is getting power.
3. Move to the ignition system: Spark check is next, followed by inspecting the ignition coil and other ignition components.
If you're not comfortable working on your car's fuel system or electrical components, take it to a qualified mechanic. Improperly handling fuel can be dangerous. Remember to always disconnect the negative battery terminal before working on any electrical components.
