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 80 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Idle Switch
- Connect multimeter between terminal No. 1 of Test Adapter (VW 1501 ) and ground. Multimeter should read battery voltage. Turn ignition off. Switch multimeter to ohms range.
- Move throttle valve .20-.28" (.5-.7 mm). Measurement is made with feeler gauge between throttle valve stop and adjustment screw. Resistance should change from zero ohm (with throttle closed) to infinity as throttle gap increases beyond .020" (.5 mm).
- If resistance is not as specified, adjust idle gap to .006-.020" (.15-.5 mm). If resistance is as specified, check full throttle switch.
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.