HOW TO REPLACE SPARK PLUGS & COILS ON 2015 CHRYSLER 200 C 3.6L V6 - FAST & EASY - FIX MISFIRE IDLE

Introduction

This tutorial provides a step-by-step guide on how to replace spark plugs and ignition coils in a 2015 Chrysler 200 with a 3.6L V6 engine. This procedure is applicable to several Chrysler and Dodge vehicles with the same engine. By following these instructions, you can improve engine performance and fix issues like misfires or rough idling.

Step 1: Remove the Engine Cover

• Pull and pry to remove the engine cover.
• This will expose the engine and enable access to the spark plugs and coils.

Step 2: Disconnect the Negative Battery Cable

• Use a 10mm socket to loosen the nut on the negative battery cable.
• Make sure to cover the area with a rag to prevent accidental contact with the battery during removal.

Step 3: Remove the Air Box

• Locate the clip on the air box and loosen it.
• Use an 8mm socket or flathead screwdriver to detach the box from the intake.
• Pull the air box up and to the side, clearing the working area.

Step 4: Clear the Area for the Intake Manifold

• Disconnect the vacuum hose and remove the retainer clip.
• Unplug various sensors and hoses that connect to the intake manifold:
  • Press and pull to disconnect wire harnesses.
  • Use lubricant if hoses are stuck.
• Remove any brackets or bolts that obstruct the manifold.

Step 5: Remove the Intake Manifold

• Locate and remove the bolts holding the manifold in place (typically 7 bolts).
• Use an 8mm socket with an extension for hard-to-reach bolts.
• Carefully lift the manifold off, ensuring no debris falls into the engine.

Step 6: Replace Spark Plugs and Ignition Coils

• For each cylinder:
  • Remove the ignition coil by unscrewing it with a 10mm socket.
  • Use a spark plug socket with an extension to unscrew the spark plug.
  • If the spark plug is stuck, use a breaker bar for more leverage.
  • Extract the spark plug using a magnet if necessary.
• Install new spark plugs:
  • Hand-tighten the new spark plug to avoid cross-threading.
  • Reattach the ignition coil, ensuring it clicks into place.
  • Tighten the coil with a 10mm socket.

Step 7: Reinstall the Intake Manifold

• Before reinstalling, ensure the new gaskets are in place (recommended Fel-Pro part number MS97205).
• Clean mating surfaces to ensure a good seal.
• Align the manifold and tighten the bolts in the following order:
  1. Closest to the throttle body
  2. Then in sequential order to the last bolt
• Do not over-tighten; follow specified torque settings (around 75-85 Newton meters).

Step 8: Reconnect All Hoses and Cables

• Reattach hoses, sensors, and any brackets that were removed.
• Ensure everything is securely connected, following the reverse order of disassembly.

Conclusion

You have successfully replaced the spark plugs and ignition coils on your Chrysler 200. Remember to reconnect the negative battery cable before starting the vehicle. This maintenance task can enhance engine performance and address issues such as misfires. For future reference, consider checking other components like fuel injectors or air filters during your next maintenance session. Thank you for following this guide, and happy driving!