Rest Pressure & Leak Test
- Install valve between pressure gauge and control pressure regulator. Open 2-way valve for flow-through operation. Turn ignition on. Unplug connector at mixture control unit, and then plug it in again.
- Turn ignition off. Observe cut-off pressure on gauge. Pressure should not drop below 24 psi (1.7 kg/cm2 ) for several minutes. If pressure drops too soon, check one or both "O" rings in pressure regulator for leaks.
- Also check warm-up regulator or supply line for leaking. Fuel pump check valve for leaking or pressure reservoir for leaks. Repair or replace parts as necessary and recheck system.