Fuel System:
* Fuel Pump: A failing fuel pump can't deliver enough fuel to the engine, causing it to stall. This is a common problem in older cars.
* Fuel Filter: A clogged fuel filter restricts fuel flow, leading to similar symptoms.
* Fuel Injectors: Clogged or faulty injectors prevent proper fuel delivery to the cylinders.
* Fuel Pressure Regulator: A malfunctioning regulator can cause inconsistent fuel pressure.
Ignition System:
* Crankshaft Position Sensor (CKP): This sensor tells the engine's computer where the crankshaft is in its rotation. A faulty CKP sensor will prevent the engine from starting or running consistently.
* Cam Position Sensor (CMP): Similar to the CKP sensor, but monitors the camshaft.
* Ignition Coil: A weak or failing ignition coil can't provide enough spark to ignite the fuel-air mixture.
* Spark Plugs & Wires: Worn, fouled, or damaged spark plugs and wires can prevent proper ignition.
* Distributor (if applicable): While less common in 1995 models, some might still have a distributor. Problems here could affect ignition timing and spark delivery.
Electrical System:
* Battery/Alternator: A weak battery or failing alternator can't supply enough power to the engine, causing it to cut out.
* Wiring Issues: Damaged or corroded wiring harnesses can interrupt the electrical signals to crucial components.
* Computer/ECM (Engine Control Module): A faulty ECM can cause a variety of problems, including stalling. This is less common but possible.
Other Possibilities:
* Throttle Position Sensor (TPS): A faulty TPS provides inaccurate information to the ECM about throttle position, leading to erratic engine behavior.
* Mass Airflow Sensor (MAF): A dirty or faulty MAF sensor provides incorrect information about the amount of air entering the engine, affecting fuel delivery.
* Vacuum Leaks: Leaks in the vacuum system can disrupt engine operation.
* Transmission Issues: In rare cases, transmission problems could cause the engine to cut out, especially if the car is under load.
Troubleshooting Steps:
It's crucial to have a qualified mechanic diagnose the issue. However, some preliminary checks can help narrow it down:
1. Check the Battery and Alternator: Test the battery voltage and have the alternator tested.
2. Inspect Spark Plugs and Wires: Check their condition visually.
3. Listen for unusual noises: A whining fuel pump or clicking noises from the ignition system can provide clues.
Important Note: Without a proper inspection, it's impossible to pinpoint the exact cause. Attempting to diagnose and repair this yourself could be dangerous and potentially costly if you make the wrong assumptions. Take your Cadillac to a qualified mechanic for a diagnosis and repair.
