my BMW X3 G01 (2018-2024) has a rough idle when starting what to do

Solution

1. Preparation

• Gather tools and materials required for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Air Filter

• Remove the engine cover if necessary.
• Locate the air filter housing and open it.
• Remove the air filter and inspect for dirt or damage.
• Replace with a new OEM-quality air filter if needed.
• Reassemble the air filter housing and engine cover.

3. Check Fuel System

• Reconnect the battery terminal.
• Attach a fuel pressure gauge to the fuel rail.
• Start the engine and observe the fuel pressure reading; it should meet manufacturer specifications (typically around 50-60 PSI).
• If pressure is low, check the fuel pump and fuel filter; replace them if faulty.

4. Inspect Ignition Components

• Remove the ignition coils from the spark plugs.
• Check for any signs of wear or damage on the ignition coils.
• Replace any faulty ignition coils with OEM parts.
• Remove spark plugs, inspect for wear, and replace if necessary.
• Reinstall ignition coils and ensure they are seated properly.

5. Inspect for Vacuum Leaks

• Visually inspect all intake hoses and gaskets for cracks or leaks.
• Use a smoke machine or carburetor cleaner to check for vacuum leaks around the intake manifold.
• Replace any damaged hoses or gaskets.

6. Clean Throttle Body

• Locate the throttle body and remove it from the intake manifold.
• Use throttle body cleaner and a soft cloth to clean the interior surfaces.
• Reinstall the throttle body and reconnect all hoses and electrical connectors.