why does my Acura MDX YF3 (2022-Present) shake while idling

Symptoms

• Shaking or vibration felt in the cabin while the vehicle is idling.
• Possible accompanying symptoms may include:
  • Check engine light illuminated.
  • Rough idle.
  • Unusual noises from the engine bay.
  • Decreased fuel efficiency.
  • Stalling or difficulty starting.

Diagnostic Steps

1. Scan for Error Codes

   • Use an OBD-II scanner to check for any stored trouble codes. This will help identify if there are any issues with engine performance or sensor malfunctions.

2. Inspect Engine Mounts

   • Check the engine mounts for wear or damage. Worn mounts can lead to excessive vibration during idle.

3. Check Spark Plugs and Ignition System

   • Inspect spark plugs for wear, fouling, or incorrect gaps. A failing ignition system can cause rough idling.

4. Evaluate Fuel System

   • Check the fuel pressure using a fuel pressure gauge to ensure the fuel pump is delivering the right amount of fuel.
   • Inspect the fuel injectors for clogs or failure.

5. Examine Air Intake System

   • Inspect the air filter for clogging and ensure there are no vacuum leaks in the intake system.

6. Test with Multimeter

   • Use a multimeter to check the resistance of the ignition coils. A faulty coil can cause misfires that result in shaking.

Repair Instructions

1. Replace Spark Plugs (if needed)

   • Tools Required: Socket set, torque wrench.
   • Remove the ignition coil cover and disconnect the ignition coils.
   • Remove old spark plugs and replace them with new ones, ensuring they are properly gapped.
   • Reinstall the ignition coils and cover.

2. Repair or Replace Engine Mounts (if needed)

   • Tools Required: Socket set, jack, jack stands.
   • Safely lift the vehicle and support it with jack stands.
   • Remove the bolts securing the engine mount and replace it with a new mount.
   • Reinstall bolts and lower the vehicle.

3. Clean or Replace Fuel Injectors (if needed)

   • Tools Required: Fuel injector cleaning kit or replacement injectors.
   • If cleaning, follow the manufacturer’s instructions for using the cleaning kit.
   • If replacing, remove the fuel rail and injectors, install new injectors, and reassemble.

4. Repair Air Intake System (if needed)

   • Tools Required: Screwdriver set, torque wrench.
   • Replace the air filter and inspect the intake hoses for cracks or leaks.
   • Tighten or replace hoses as necessary.

Estimated Time for Repair

• Replacing spark plugs: 1-2 hours.
• Replacing engine mounts: 2-3 hours.
• Cleaning/replacing fuel injectors: 2-4 hours depending on accessibility.
• Repairing the air intake system: 1 hour.

Safety Warnings

• Always ensure the vehicle is on a level surface and secured with jack stands when working underneath the vehicle.
• Be cautious when handling fuel and ignition components to prevent fire hazards.