Cylinder 8 Pressure Variation Low

Common symptoms

What you'll notice

• Check for any vacuum leaks in the intake manifold or hoses.
• Inspect the ignition system for faulty spark plugs or ignition coils.
• Clean or replace the fuel injectors to ensure proper fuel delivery.
• Perform a compression test to check for any issues with the cylinder's internal components.
• If all else fails, consider replacing the cylinder or engine components related to cylinder 8.

Common causes

Most likely first

1. Faulty spark plug in cylinder 8
2. Ignition coil malfunction in cylinder 8
3. Clogged fuel injector in cylinder 8
4. Compression loss in cylinder 8
5. Faulty oxygen sensor in cylinder 8

How to diagnose & fix

Work through it in order

1. Engine misfires or runs rough
2. Decreased engine power or acceleration
3. Increased fuel consumption
4. Engine stalls or has difficulty starting
5. Illuminated check engine light