why does my Volkswagen Passat B8 (2015-2022) engine sputter when driving

Solution

1. Preparation

• Gather tools and parts: OBD-II scanner, fuel pressure gauge, socket set, torque wrench, replacement spark plugs, ignition coils (if needed), fuel filter (if needed).
• Disconnect the battery to prevent electrical shorts and ensure safety while working.

2. Address Ignition System

• Sub-step 1: Remove the engine cover (if applicable) using a socket set.
• Sub-step 2: Check and replace spark plugs if they show signs of wear or fouling (use manufacturer-recommended spark plugs).
• Sub-step 3: Inspect and replace ignition coils as necessary; ensure to torque them to manufacturer's specifications.
• Sub-step 4: Reconnect the battery and clear any error codes with the OBD-II scanner.

3. Inspect Fuel System

• Sub-step 1: Locate the fuel filter and check for blockages; replace it if necessary.
• Sub-step 2: Use a fuel pressure gauge to check the fuel pressure. If the pressure is outside the specified range, inspect the fuel pump and lines for issues.
• Sub-step 3: Reconnect any disconnected components and ensure all fittings are secure.

4. Check Air Intake and Exhaust Systems

• Sub-step 1: Inspect the air intake system, cleaning the MAF sensor and throttle body with appropriate cleaners.
• Sub-step 2: Check for vacuum leaks around hoses and intake manifold; replace any damaged hoses.
• Sub-step 3: Examine the exhaust system, particularly the catalytic converter, for blockages or damage. Replace if necessary.