Possible Causes:
* Fuel System Problems: This is a very common cause of stalling. Possible culprits include:
* Fuel pump failure: The pump might be failing to deliver fuel to the engine.
* Fuel filter clog: A clogged filter restricts fuel flow.
* Fuel injectors: One or more injectors might be clogged or malfunctioning.
* Fuel pressure regulator: This component regulates fuel pressure; a malfunction can cause erratic fuel delivery.
* Ignition System Issues: Problems here can prevent the engine from firing correctly:
* Distributor cap/rotor: Worn or damaged components can cause misfires and stalling.
* Ignition coil: A faulty coil won't provide the necessary spark.
* Spark plugs/wires: Worn or damaged spark plugs or wires can lead to misfires.
* Crankshaft Position Sensor (CKP): This sensor tells the computer the engine's rotational speed; a failure can prevent starting or cause stalling.
* Sensor Malfunctions: Various sensors monitor engine conditions. A faulty sensor can cause the computer to misinterpret data and shut down the engine. Common culprits include:
* Mass Air Flow (MAF) sensor: Measures the amount of air entering the engine.
* Throttle Position Sensor (TPS): Monitors throttle position.
* Oxygen (O2) sensor: Measures the amount of oxygen in the exhaust.
* Other Potential Problems:
* Alternator: While less likely to cause an immediate stall, a failing alternator can leave the battery with insufficient charge, eventually leading to stalling.
* Vacuum leaks: Leaks in the vacuum system can disrupt engine operation.
What You Should Do:
1. Retrieve the DTC: You'll need an OBD-I code reader (specific to older vehicles like your 1991 Capri). Auto parts stores often have these available for loan or can scan your vehicle for a small fee. The code(s) will provide crucial clues about the problem.
2. Check the basics: Before taking it to a mechanic, perform some basic checks:
* Fuel: Make sure the fuel tank isn't empty.
* Battery terminals: Clean and tighten the battery terminals to ensure good contact.
* Visible damage: Inspect the engine bay for any obvious signs of damage (broken wires, loose connections).
3. Seek professional help: Unless you have significant automotive experience, it's best to take your Capri to a qualified mechanic. They have the tools and expertise to diagnose and fix the problem based on the DTC and their assessment. Mention the check engine light and the stalling issue immediately.
Ignoring the problem is risky. Continuing to drive the car with a check engine light and intermittent stalling could cause further damage to the engine. Get it diagnosed and repaired promptly.
