Thermo time switch

[FiatFan]

The ohms read 35.7 on my TTS the Brad Antique says it should read 0. Does this mean replace it? I have a crank but no start and now have taken of the intake and injector rail. The clips on the connectors can drive you crazy is there a better solution? I will replace the injectors, cold start and connectors.

[spider2081]

The thermal time switch activates the cold start valve for about 10 seconds. This is sort of like the chocking a carburetor in that it adds fuel to the intake. I would pull the brake vacuum line off the intake plenum and spray starter fluid or pour a little gas into the the plenum to see it that gets the car to fire off. If the car does not start the thermal timer is probably not the problem.

[FiatFan]

Thanks I did that and it would start tested the Cold Start and nothing. I have now decided to go through it all

[spider2081]

Thanks I did that and it would start tested the Cold Start and nothing.

sounds good. Did you check for voltage at the cold start valve connector and the thermal timer connectors?? One pin on each of the connectors should have very close to battery voltage on them when the ignition switch is in the "start" position. So this generally takes two people to make the test. . The other pin on each connects the cold start valve to the thermal timer. If you can identify this wire and use a sharp pin with alligator clips to ground it, this bypasses the thermal timer. If the car starts with the thermal timer bypassed quickly disconnect the bypass or the engine will flood and stall.

[FiatFan]

I I follow up up to the other pin and alligator clip can you explain it a bit more? I replaced the TTS with one I bought from Bayless but it reads 35 OHMS cold. Thanks

[spider2081]

The cold start valve has 12 volts applied to one of its pins when the ignition switch is in the start position, through the double FI relay. The other pin on the cold start valve get a ground from the thermal time switch.
Looking carefully at the thermal time switch the pins are identified with the letters "G" and "W". Terminal "G" should have battery voltage on it when the ignition switch is in the "start" position. Use an ohm meter and trace the wire on pin "W" to a pin on the cold start valve. This pin needs to be grounded for the cold start valve to activate. I like to ground this wire with a jumper . It is a white wire with the # 46 on it. If the car does not start with the wire grounded the cold start valve might be stuck in the off position. Hope this helps.
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