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.
1987 Audi 5000 CS, StandardFACTORY OEM SERVICE PROCEDURE
Differential Pressure Regulator
- Using Adapter (1315 A/1 ), connect multimeter to differential pressure regulator. Set multimeter to 200 mA DC scale. Turn ignition on. Insert fuse in top of fuel pump relay for at least 4 seconds.
- Indicator light should display Code 4341. Multimeter should read 100 mA. Close full throttle switch. Multimeter reading should change to 10 mA.
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.