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 >> Cold Start Valve
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Cold Start Valve

  1. Check cold start valve with engine coolant temperature below 86°F (30°C). Disconnect and ground high tension lead at distributor cap end. Remove cold start valve from intake manifold with wiring and fuel line connected. Point tip into safe container.
  2. Crank starter for 10 seconds. Valve should emit cone-shaped spray for time allowed by thermo time switch. Dry off tip and check for leaks. Acceptable leakage rate of cold start valve is one drip per minute or less.