Problem Reports » Problem With Idle Air Bypass Valve May Cause Engine Performance Problems

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Ford Mustang

 

Report: Problem With Idle Air Bypass Valve May Cause Engine Performance Problems

Ford Mustang Problem
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Model Year Affected: 1990

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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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