Cold Start Valve

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

Fig 1: Bosch Manifold Pressure Controlled (MPC) Fuel Injection System (Typical)

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