[bpu699]

Subscribed to this old thread. Rebuilt my 930 motor and cracked the thermotime switch.

Can I try to start the motor to break it in if this switch is bad, or need to replace switch first?

Will ohm test tommorrow

Thanks folks

Edit: found a cool way to test it:


The thermo/time switch grounds the injector relay for aprox 8 seconds when cold and less time as the temp increases.

The "simple" test is to connect the switch housing to ground, attach a test light to the terminal with the larger screw and to the + terminal of the battery. the starter connects to the small screw terminal. connect power to the testlight and the small termal at the same time. When cold the lamp should stay on for about 8 secs and drop off the time it ramains on as the temp increases to 35deg C.

Because this is an electro-mechanical switch the heating coil inside the switch has to cool for about 30 seconds between tests.

Also when installed in the car, the same holds true, The cold start injector will not operate a second time untill the heating element inside the switch has had time to cool