Cylinder 7 Pressure Variation Low

Common symptoms

What you'll notice

• Check the spark plugs and wires for any damage or wear and replace if necessary.
• Inspect the ignition coil for faults or malfunction and replace if needed.
• Clean or replace the fuel injectors to ensure proper fuel delivery to cylinder 7.
• Perform a compression test to check for any internal engine issues, such as a leaking head gasket or low compression, and repair as required.

Common causes

Most likely first

1. Faulty ignition coil
2. Clogged fuel injector
3. Vacuum leak
4. Low compression in cylinder 7
5. Faulty engine control module (ECM)

How to diagnose & fix

Work through it in order

1. Engine misfires or runs rough
2. Decreased power and acceleration
3. Engine hesitation or stumbling
4. Increased fuel consumption
5. Check Engine Light (CEL) illuminates