Volkswagen Golf Seventh Generation (2013-2020) check engine light flashes when driving what does it...

Solution

1. Preparation

• Gather tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the battery to prevent electrical shorts.

2. Inspect Ignition System

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover (if applicable).
• Inspect spark plugs for wear and carbon buildup; replace if necessary.
• Check ignition coils for cracks or damage; replace faulty coils.
• Reinstall spark plugs and coil packs, ensuring they are torqued to manufacturer specifications.

3. Check Fuel System

• Tools Required: Fuel pressure gauge, multimeter.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition on (without starting) and check for proper fuel pressure according to specifications.
• If pressure is low, inspect the fuel pump and filter for blockages or failure.
• Test fuel injectors for proper operation using a multimeter; replace any faulty injectors.

4. Inspect Intake and Exhaust Systems

• Tools Required: Visual inspection tools (flashlight, mirror).
• Visually inspect the intake manifold and hoses for cracks or disconnections.
• Check the exhaust system for any blockages or leaks, focusing on the catalytic converter.
• Repair or replace any damaged components.

5. Check for Vacuum Leaks

• Tools Required: Smoke machine (optional), vacuum gauge.
• Use the smoke machine to detect vacuum leaks in the intake system.
• If using a vacuum gauge, connect it and observe readings while the engine is running.
• Repair any identified leaks.

6. Engine Compression Test

• Tools Required: Compression tester.
• Remove spark plugs to gain access to the cylinders.
• Insert the compression tester into the spark plug hole and crank the engine.
• Record the compression readings for each cylinder; compare to manufacturer specifications.
• Address any cylinders with low compression by investigating potential internal engine issues.