Connect Fuel Non Return Valve - Black - Pk 2

A fuel non-return valve (or check valve) is designed to allow fuel to flow in only one direction, preventing it from flowing backward through the fuel line. This helps maintain fuel pressure in the system, especially when the engine is off, ensuring easier starting.

Symptoms might include difficulty starting the engine after it has been sitting for a while, or if you notice a significant drop in fuel pressure when the engine is off. It's also good practice to replace them as part of regular maintenance on compatible vehicles.

This refers to the type of fuel injection system manufactured by Siemens that is used in certain Audi and VW engines. The non-return valve is designed to be compatible with these specific systems.

This Connect Fuel Non Return Valve is specifically designed for Audi and VW 1.6 engines with compatible injector and pump references (03L130277B/J, 03L130755AH/E) and Siemens systems. Using it on incompatible systems may lead to poor performance or damage.

This valve is designed for fuel pipes with a diameter of 3.0mm to 3.2mm.

Yes, it is crucial to install the valve in the correct direction. There is typically an arrow on the valve indicating the direction of fuel flow. Ensure this arrow points away from the fuel tank towards the engine.

Verify the non-return valve is installed correctly with the flow arrow pointing in the right direction. Check that the fuel line is securely connected and there are no leaks. Ensure the valve is compatible with your specific injector and pump part numbers.

Inspect the non-return valve for any signs of damage or blockage. Ensure it's the correct size for the fuel line (3.0mm - 3.2mm). If the issue persists, consider other components in the fuel system.

This often indicates fuel draining back. Ensure the non-return valve is holding pressure. Replace the valve if it is suspected to be faulty or if it's beyond its service life.