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.
1988 Audi 5000 CS, AutomaticFACTORY OEM SERVICE PROCEDURE
Audi 90
- Ensure engine is at normal operating temperature. Ensure A/C if off and that no knock sensor faults exist. Start engine and allow to idle. Insert fuse in top of fuel pump relay. See Figure. This stabilizes timing for checking and adjusting. If timing is not 13-15 degrees, loosen distributor clamp and adjust to 15 ±1 degree.
- Remove fuse from fuel pump relay and increase engine speed above 2500 RPM. This will cancel the fault display warning light. Allow engine to idle. Ignition timing may vary between 7 and 20 degrees. Reset idle speed if necessary. Ensure distributor clamp is tight.
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.