Quote:
Originally Posted by jordan
The reason being is because the computer wasnt properly telling the TPS to open at the proper amount. instead it was telling the TPS to idle at 3% which it should be at 1% open. so a reflash (reprogram) of the PCM fixed the problem. There....you just learned something.
|
No. The Throttle Position Sensor does not "open" any amount. It's a sensor that reads how much the butterfly plate in the throttle body is turned, and relays that information to the PCM to determine many different things that are dependant on TPS, such as shift speed, PE (Power Enrichment), and various other tables. There is
no reason the PCM would or could "tell the TPS" to idle at whatever throttle percentage.
Idle RPM is controlled by Engine Coolant Temp, VE (Volumetric Efficiency) and MAP (Manifold Air Pressure).
Either your TPS was faulty, and they replaced it, or your IAC (Idle Air Control) valve was faulty, and they replaced that. There is NO reason they should have to re-tune your car based on mechanical failure.