Most people seem to think it's the actual cold start injector that failed, but 98% of the time it's this switch that has failed. cold start thermo-time switch (cold start injector switch) If your trucks cranks excessively (more than a few seconds) when it is cold, and you don't get "fast idle", check this switch. on the 3.0 it's mounted on the little water block on the back of the motor near the. There's also the cold-start timer switch. A fuel delivery pipe bolts to it with a banjo bolt, and there's a black plug that plugs into the top of it. Well, the cold-start injector is mounted on the passenger side of the plenum. ![]() Many cars have more than one coolant temperature sensor.409 Posts. The tip of the ECT sensor protrudes into one of the cooling system passages and is immersed in coolant. You will face problems while changing gears 7.3 crank no start flow chartA typical engine cooling temperature sensor is a Negative Temperature Coefficient (NTC) thermistor, which means its electrical resistance decreases when the temperature increases. Check engine light or other lights such as ABS and traction control 2. S schiker Well-Known Member Messages 3,006You have to get a hold on to the symptoms. Then look at rail pressure : must be over 4K PSI before ECM will fire the injectors. Disconnect the fan at the lower radiator and see if it fires off. Also if the fan shorts out it won't start. Look at batteries, grounds, and the starter for cranking RPM being low. ![]() Upon measuring the coolant temperature, the sensor passes on a signal to the car’s. Monitoring of the engine coolant is necessary as the engine’s fuel requirements are higher when it is cold, and lower when the engine is warm. The coolant temperature sensor is responsible for monitoring the temperature of the coolant in your car engine. The sensor connections changed between these years and I had noticed butt connectors used on them to connect a generic connector. My engine was transplanted from a '93 3VZE into my '88 by a previous owner.
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