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Home >> BMW >> 1978 >> 633CSi Standard Trans >> Repair and Diagnosis >> Engine Mechanical >> Fuel System >> Fuel Injection - BOSCH AFC - EUROPEAN Models >> Testing >> Cold Start Valve >> 1975-76 Models (All)

1975-76 Models (All)

Connect pressure gauge to injector supply line. Operate starter to build-up fuel pressure. Disconnect cold start valve. Connect wires from negative coil terminal to cold start valve. Observe fuel pressure reading, it should slowly decrease. If pressure does not drop, replace cold start valve.