What does a cold start injector time switch do?
Cold Start Time Switch: This Time Switch tells the Cold Start Injector when to fire. It is located under the throttle body on the lower intake manifold, right next to the ECU coolant temperature sensor (not the gauge temperature sensor).
What is a cold start injector activated by?
The cold start injector is a fuel injector that is electronically controlled and is added to the cold air intake, which is located on the intake manifold. If engine temperature reaches below a certain point, the computer lets the injector know to add more fuel into the air mixture.
Where is the cold start sensor?
In most makes, the cold start valve will be located within the air intake distributor. Remove the air intake cover and the air filter. You should notice a small valve that looks like a fuel injector within the assembly.
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How does a thermo time switch work?
The Thermotime switch is a temperature switch that turns on the Cold Start valve during startup when the engine temperature is cold enough. This system is only powered during start, so it should not give you a rich condition unless the cold start valve is faulty and leaking.
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How do I know if my cold injector is bad?
Symptoms of a Bad or Failing Cold Start Injector
- Hard Starting. One of the first symptoms typically associated with a bad cold start injector is a problem starting the vehicle.
- Decrease in MPG. A decrease in fuel efficiency is another symptom of a bad or failing or failing cold start injector.
- Engine performance issues.
What sensor controls cold start?
A thermotime switch, or TTS, is a sensor used to control the cold start enrichment process in some older fuel injection systems.
What is cold start switch?
The cold start injector, also referred to as the cold start valve, is an engine management component found on many road going vehicles. It’s purpose is to supply the engine with additional fuel to enrich the fuel mixture in cold temperatures where air density is increased and additional fuel is required.
How does a cold start switch work?
When an engine first starts, the coolant temperature is cold and the bimetallic strip is closed, which in turn supplies the cold start injector with current.
How do you test a thermo time switch?
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.
What is the cold start sensor?
What is a cold start fuel injector?
The cold start injector is also known as the cold start valve. The part is located on the cold air intake, which is found on the intake manifold. It is a fuel injector that is controlled electronically. The cold start injector works only when the engine has a cold start, or when the engine’s temperature is below a certain point.
What is an engine cold start?
A cold start is an attempt to start a vehicle’s engine when it is cold, relative to its normal operating temperature, often due to normal cold weather.
How does cold start injector system work?
The cold start injector is a fuel injector that is electronically controlled and is added to the cold air intake, which is located on the intake manifold. If engine temperature reaches below a certain point, the computer lets the injector know to add more fuel into the air mixture.
