Fuel Injector Leak Test
WARNING: This page is about a different car, the 2000 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure fuel system pressure is within specification before performing this test. Remove fuel rail complete with fuel injectors from engine. DO NOT disconnect fuel supply or return lines. Using VAG 1551 scan tool, energize fuel pump.
- With fuel pump running, visually inspect fuel injector for leaks. Maximum allowable leakage is 1-2 drops of fuel per injector per minute. If fuel injector leaks more than 2 drops of fuel per minute, replace leaking fuel injector. ALWAYS replace fuel injector "O" rings.