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 Electrical System
- Connect Pressure Gauge (VW 1318 ) as previously described. See Figure . Close pressure gauge valve. Disconnect differential pressure regulator connector from side of regulator.
- Using Adapter (1315 A/1 ), connect Multimeter (US 1119 ) to differential pressure regulator and to the connector removed from the regulator. See Fig 1 .
- Set multimeter to 200Ma DC scale. Turn ignition on. Multimeter should read 100Ma. Pressure gauge should read 17-22 psi (1.2-1.5 kg/cm2 ) less than readings noted in the FUEL INJECTION SYSTEM PRESSURE test.
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.