Here's a breakdown of the situation and what to do:
1. Immediate Safety:
* Don't force the ignition: Trying to turn the key repeatedly could damage the ignition switch.
* Disconnect the battery: This will cut power to the engine and prevent further damage. Important: Disconnect the negative (black) terminal first and reconnect it last.
2. Possible Causes:
* Ignition switch failure: The switch might be stuck in the "on" position.
* Faulty starter solenoid: The solenoid is responsible for engaging the starter motor. A stuck solenoid can keep the engine running.
* Electrical short: A short in the wiring could be sending power to the engine even when the key is off.
* Stuck throttle cable: A stuck throttle cable could keep the engine running at high revs.
* Faulty fuel pump: While rare, a faulty fuel pump could continue to pump fuel even when the engine is supposed to be off.
3. What to Do Next:
* Consult your owner's manual: It might offer troubleshooting tips for your specific model.
* Contact a qualified mechanic: This is the safest option. A mechanic can diagnose the problem and perform necessary repairs.
* If you're comfortable with basic car maintenance:
* Check the ignition switch for signs of damage or sticking.
* Inspect the throttle cable for any kinks or obstructions.
* Look for any obvious signs of wiring damage or loose connections.
Important: If you're not comfortable working with electrical components, leave the repairs to a professional.
Remember: A car with a running engine that won't shut off is a dangerous situation. Don't try to drive it, and prioritize getting professional help as soon as possible.
