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Why would a 1995 Buick Park Avenue stall when your foot is taken off the accelerator?

Possible Cause 1: Idle Air Control (IAC) Valve is Dirty or Faulty

- Controls the amount of air that bypasses the throttle plate when the engine is idling

- A dirty or faulty IAC valve can cause the engine to stall when the throttle is suddenly closed because it can't adjust the airflow quickly enough to maintain a smooth idle

Other Potential Causes:

- Vacuum leaks

- Faulty throttle position sensor

- Clogged fuel filter

- Fuel pressure regulator issues

- Malfunctioning oxygen sensor

- Problems with the ignition system or engine control module.

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