Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1996 Audi A4 Base, StandardFACTORY OEM SERVICE PROCEDURE
Fuel Injector Leak Test
- 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.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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