Cold Start Valve Check

Fig. 27 Cold Start System:

NOTE: The following tests are to be performed with the engine cold.
1. Remove the cold start injector.
2. Aim the cold start injector into a fuel safe container.
3. Press switch on by-pass harness to activate pump and pressurize the fuel system.
4. The cold start valve must not leak more than one drop per minute. If it leaks, replace the injector using a new "O" ring.
5. Energize the starter. The injector should spray with a cone span of approximately 80°.
6. If the cold start valve does not spray, feed the injector using harness (-).0141 BH.
7. If the injector still does not spray, replace it.
8. If the injector now sprays, check the electrical circuit as follows:
a. Check to see that the battery is fully charged and that the tachymetric relay is disconnected.
b. Check the available voltage at the connector to the injector and at the cold start valve by connecting a voltmeter to each in turn and energizing the starter. The voltage reading should be 9 volts or above. If it is not correct, check the circuits continuity.

Fig. 27 Cold Start System:

c. Test the continuity of the wire from the thermotime switch to the cold start valve (46C) with an ohmmeter. The resistance should be less than 1 ohm.
d. Test the continuity of the ground connection between the thermotime switch and the engine block with an ohmmeter. Resistance should be less than 1 ohm.
e. If the resistances are incorrect, repair faulty circuits.
f. If the resistances are correct, test the thermotime switch.