Car Problem Reports

Ford Crown Victoria Problem With Idle Air Bypass Valve May Cause Engine Performance Problems

Ford Crown Victoria Problem
4 Reports
Me Too

Model Years Affected: 1990, 1991, 1999

Engine Affected: 5.0L V8

Average Mileage: 176,500 mi (100,000 mi - 253,000 mi)


If you experience difficulty starting the engine when cold, stalling at idle, or hesitations during acceleration, it may be the idle air bypass valve. This valve helps the vehicle idle steady when the accelerator pedal is not pressed.

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