Porsche Fuel System Bleeding

Supported coding features by PoCOM diagnostic tool https://www.obdtester.com/pocom

Fuel System Bleeding

What it does

• Removes air from the fuel system
• Ensures correct fuel pressure and stable engine operation
• Protects high-pressure fuel components from damage

When it is required

• After replacing fuel filter
• After fuel pump or fuel line replacement
• After running the fuel system empty
• When hard starting or unstable idle occurs

Conditions that must be met

• Vehicle stationary
• Ignition ON (engine OFF, unless instructed otherwise)
• Stable battery voltage
• Sufficient fuel level
• Diagnostic tool connected

What happens during bleeding

• Electric fuel pump is activated via diagnostic command
• Air is purged from fuel lines
• Fuel pressure is stabilized
• ECU monitors pressure and flow

If bleeding is not performed

• Engine may not start or may stall
• Irregular fuel pressure
• Increased wear of fuel system components
• Fault codes may be stored

After bleeding

• Start engine and check for smooth operation
• Verify fuel pressure in live data
• Check for fuel leaks
• Clear fault codes if present

Coverage in PoCOM