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Home >> Porsche >> 1984 >> 928 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - BOSCH AFC >> Testing >> Auxiliary Air Valve
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Auxiliary Air Valve

  1. Disconnect electrical connector and connect ohmmeter leads to valve terminals. Resistance should measure approximately 30 ohms. Pull off hoses and disconnect ohmmeter. Valve should be open on cold engine and closed on warm engine.
  2. Reconnect electrical connector and turn ignition switch "ON". Valve should be completely closed after 5 minutes. If valve does not respond as outlined, replace auxiliary air valve.
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