Cylinder 5 Pressure Too High

Common symptoms

What you'll notice

• Check for any clogs or blockages in the fuel injection system
• Inspect and clean the fuel injectors of cylinder 5
• Verify the fuel pressure regulator is functioning properly and replace if necessary
• Check the ignition system, including spark plugs and ignition coils, for any issues and replace as needed
• Perform a compression test on cylinder 5 to check for any internal engine problems

Common causes

Most likely first

1. Faulty fuel injector in cylinder 5
2. Damaged or stuck open fuel pressure regulator
3. Malfunctioning engine control module (ECM)
4. Leaking or restricted fuel line to cylinder 5

How to diagnose & fix

Work through it in order

1. Engine misfires or runs rough
2. Decreased fuel efficiency
3. Poor acceleration or lack of power
4. Check Engine light illuminated
5. Engine overheating