Cold Start Valve, THERMO Time Switch & Pulse Relay
CAUTION:
Do not connect jumper wire directly to battery during testing procedure. There is EXTREME fire danger due to atomized fuel and sparks may occur when wire is touched to battery.
- If engine coolant is below 85°F (30°C), disconnect plug on cold start valve and connect test lamp across terminals. Remove coil high tension wire to prevent starting. Operate starter.
- On models without pulse relay, test lamp will light for several seconds, then go out. On models with pulse relay, lamp will continue to flash off and on. If lamp does not light, test thermo time switch for continuity below opening temperature. If good, check wiring to starter terminal.
- Remove cold start valve from manifold but leave fuel line connected. Place valve in container. See Fig 1 . Connect jumper wire from one terminal to ground, and from other terminal of cold start valve to switch. Other side of switch should be connected to source of battery voltage. Operate fuel pump.
- Turn switch on. Cold start injector should spray. Turn switch off, but leave fuel pump running. Injector should stop spraying. Wipe off nozzle. No drops should form within 1 minute with pump running. Replace cold start valve that is faulty. Install original valve if good, making sure that "O" ring is properly positioned. 2) On models without hot start pulse relay, test lamp will light for several seconds, then go out. On models with relay, lamp will continue to flash off and on. If lamp does not light, test thermo time switch for continuity below opening temperature. If good, check wiring to starter terminal.
- Remove cold start valve from manifold but leave fuel line connected. Place valve in container. See Fig 1 . Connect jumper wire from one terminal to ground, and from other terminal of cold start valve to switch. Other side of switch should be connected to source of battery voltage. Operate fuel pump.
- Turn switch on. Cold start injector should spray. Turn switch off, but leave fuel pump running. Injector should not spray. Wipe off nozzle and check for leakage. With pump running, no drops should form within one minute. Replace cold start valve if faulty. Install original valve if good, making sure that "O" ring is properly positioned.