What does that all mean? A short response would be “Throttle Body Injection” on a 5.7 liter engine, “Idle Air Control”.
So why did I replace this part? The issue was a high idle at random times and when starting from a cold start the idle would not go down even after operating temperature increased.
In a normal condition the stepper motor would adjust the pintle movement closer or further away from the air passage valve into the throttle body. This would be dependent on the temperature of the coolant sensor.
The part is key in how air is introduced into the throttle body. This has a direct control over setting the idle.
Replacing the actual part is simple. The air filter assembly requires removal to gain access to the throttle body.