Warm Engine Control Pressure Test
- Connect pressure gauge and valve as in cold engine control pressure test. Open 2-way valve for flow-through operation. Unplug connector to mixture control unit. Turn ignition on, but DO NOT start engine.
- Control pressure should rise steadily to 48-54 psi (3.4-3.8 kg/cm2 ) for about 3 minutes. If not, check for voltage at connector. If voltage is present, heating coil is defective.
- Replace warm-up regulator. Install air inlet assembly. Reconnect electrical connectors to auxiliary air regulator and mixture control unit. Start engine. Allow engine to idle. Control pressure should stabilize at 48-54 psi (3.4-3.8 kg/cm2 ).