LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Audi >> 1987 >> 5000 CS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> BOSCH Cis-E System >> Testing >> Cold Start Enrichment >> Auxiliary Air Valve
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Auxiliary Air Valve

  1. Engine coolant must be below 86°F (30°C) for cold condition testing. Ignition must have been off so element in regulator has not been warmed up. Disconnect wiring connector from air regulator. Start cold engine and let it idle. Measure voltage across connector terminals. Voltage must be 11.5 volts.
  2. Pinch either regulator hose. If idle does not decrease, replace auxiliary regulator. Attach wiring to regulator. Allow engine to idle for a minimum of 5 minutes. Pinch either regulator hose. If idle speed changes replace auxiliary air valve.
scientia non olet · About LEMON Manuals