Possible Causes:
* Dirty Throttle Body: A clogged throttle body restricts airflow, causing an uneven idle.
* Vacuum Leak: Cracked or loose vacuum hoses can lead to inconsistent air intake.
* Spark Plugs and Wires: Worn spark plugs or faulty wires result in misfires, affecting idle smoothness.
* Oxygen Sensor Issues: A malfunctioning oxygen sensor can lead to incorrect fuel/air mixture, causing rough idling.
* Clogged Fuel Filter: A dirty fuel filter restricts fuel flow, impacting engine performance, including idle.
* Faulty Ignition Coil: A failing ignition coil can cause misfires, contributing to rough idling.
* Engine Sensors: Problems with sensors like the mass airflow sensor (MAF) or the crankshaft position sensor (CKP) can disrupt engine operation.
* Fuel Pressure Issues: Low fuel pressure can result in an uneven idle.
* Fuel Injector Problems: Clogged or faulty fuel injectors can cause uneven fuel delivery.
Troubleshooting Steps:
1. Inspect Throttle Body: Remove the throttle body and inspect it for buildup. Clean it thoroughly with throttle body cleaner.
2. Check Vacuum Hoses: Visually inspect all vacuum hoses for cracks, leaks, or loose connections. Replace any damaged hoses.
3. Inspect Spark Plugs & Wires: Replace worn spark plugs with the correct type for your Charger. Also, check the condition of the spark plug wires and replace any that are cracked or frayed.
4. Scan for Trouble Codes: Use an OBD-II scanner to read any error codes stored in the engine control unit (ECU). This can give valuable clues to the problem.
5. Check Fuel Filter: Inspect the fuel filter for debris or excessive discoloration. Replace it if necessary.
6. Test Fuel Pressure: Use a fuel pressure gauge to check if the fuel pressure is within the manufacturer's specifications.
7. Inspect Ignition Coils: Visually check the ignition coils for any signs of damage or wear. If necessary, replace faulty coils.
8. Check Sensors: If trouble codes point to specific sensors, test their functionality with a multimeter or replace them if faulty.
Additional Tips:
* Engine Idle Relearn: After addressing any issues, consider performing an engine idle relearn procedure to reset the ECU's idle settings.
* Professional Diagnosis: If you're not comfortable with DIY repairs, take your Charger to a qualified mechanic for a thorough diagnosis and repair.
Remember:
* Consult your Charger's owner's manual for specific maintenance schedules and repair procedures.
* Safety First: Always disconnect the battery before working on the engine.
Let me know if you have any other questions or need further assistance.
