* Fuel System:
* Fuel pump: The fuel pump might be failing to deliver fuel to the engine. Listen carefully near the fuel tank for a whirring sound when you turn the key to the "on" position (but before cranking). No sound suggests a faulty pump.
* Fuel filter: A clogged fuel filter restricts fuel flow.
* Fuel injectors: These could be clogged or faulty, preventing fuel from reaching the cylinders. This often requires a professional diagnosis.
* Fuel pressure regulator: This could be malfunctioning, causing incorrect fuel pressure.
* Ignition System:
* Distributor (if equipped): In a 1995 Town Car, it's less likely a distributor, but if it has one, the rotor, cap, or ignition coil could be faulty, preventing spark. Look for cracks or burning in the distributor cap.
* Crankshaft Position Sensor (CKP): This sensor tells the computer the engine's rotational position; a bad one prevents proper spark timing or fuel injection.
* Cam Position Sensor (CMP): Similar to the CKP, a bad CMP sensor will prevent the engine from firing.
* Ignition coil: This provides the high voltage spark to the spark plugs. A weak or faulty coil will prevent starting.
* Spark plugs and wires: Worn or fouled spark plugs or damaged wires will prevent proper ignition.
* Other Possibilities:
* Security System: A malfunctioning alarm or immobilizer system could be preventing the engine from starting.
* Computer Issues: A problem with the engine control module (ECM) or related wiring could cause starting problems. This often requires diagnostic tools.
Troubleshooting Steps:
1. Check for fuel: Can you smell fuel? If not, the fuel pump is a prime suspect.
2. Check for spark: This is more difficult, usually requiring specialized tools or a mechanic. A simple way is to remove a spark plug, ground it to the engine block, and see if there's spark when cranking the engine.
3. Listen for the fuel pump: As mentioned, listen near the fuel tank when you turn the key "on".
4. Check fuses and relays: Look at the fuse box and relay panel for any blown fuses or malfunctioning relays related to the fuel system or ignition.
5. Check for error codes: A diagnostic tool can read any trouble codes stored in the vehicle's computer, pointing toward the source of the problem. Auto parts stores often offer this service for free.
If you're not comfortable tackling these checks yourself, it's best to take your Town Car to a qualified mechanic for diagnosis and repair. They have the tools and expertise to pinpoint the problem efficiently.
