* Distributor Cap and Rotor: These components wear out over time. Hard acceleration puts extra strain on the ignition system. If the cap or rotor is worn, cracked, or has corrosion, it can cause intermittent loss of spark to one or more cylinders, resulting in misfires (the clicking noise), reduced power, and the check engine light. The clicking could be arcing within the damaged distributor cap.
* Ignition Coil: The coil is responsible for boosting the voltage needed for sparking. A failing coil may not consistently generate enough voltage under high load (hard acceleration). This would lead to similar symptoms as a bad distributor cap/rotor. It might work better after the car cools down during the restart.
* Ignition Module (sometimes integrated into the distributor): This controls the firing of the coil. A failing module could cause erratic spark delivery, leading to the same symptoms.
* Worn Spark Plugs/Wires: While less likely to cause the *clicking* sound specifically, worn plugs and wires can absolutely contribute to misfires and power loss under load.
* Crankshaft Position Sensor (CKP sensor): A failing CKP sensor can prevent the engine from receiving accurate timing information, leading to misfires and power loss. However, this would typically cause more severe starting issues rather than just loss of power under acceleration.
Why it's better after restarting:
The heat generated during hard acceleration can exacerbate problems with these components. After the car cools down, the damaged parts might function well enough temporarily, leading to improved performance. However, this is only a temporary fix; the underlying issue remains.
What to do:
1. Read the trouble codes: Use an OBD-I scanner (the type compatible with your car's year) to retrieve the Diagnostic Trouble Codes (DTCs) stored in the computer. These codes will narrow down the possible causes.
2. Inspect the distributor cap and rotor: Visually check them for cracks, corrosion, or worn contacts. These are relatively inexpensive parts.
3. Check the spark plug wires: Inspect them for cracks, fraying, or loose connections. Consider replacing them as a set.
4. Test the ignition coil (requires a multimeter): This is more advanced and may require some electrical knowledge.
5. Consult a mechanic: If you're not comfortable diagnosing and repairing these components yourself, take your Caprice to a qualified mechanic. They have the tools and expertise to diagnose the problem accurately and safely.
Ignoring the problem could lead to more severe engine damage. Addressing the issue promptly is crucial.
