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.
1990 Audi 200 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
System Pressure
- Remove fuel line from cold start valve. See Fig 1 . Remove test plug from distributor lower chamber. Connect Pressure Gauge (VW 1318) between fuel line from cold start valve to lower chamber. See Fig 1 .
- Disconnect differential pressure regulator harness connector. Remove fuel pump relay. Jump fuel pump relay socket. Open valve on pressure gauge.
- Energize fuel pump. Note pressure reading on pressure gauge. Pressure should be 88-94 psi (6.2-6.6 kg/cm2 ). System pressure is not adjustable.
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.