Problem With Idle Air Bypass Valve May Cause Engine Performance Problems on Mercury Cougar

Problem overview

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.

Mercury Cougar vehicles with this problem

1 model year affected

1990 Mercury Cougar

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Problem With Idle Air Bypass Valve May Cause Engine Performance Problems on Mercury Cougar

Problem overview

Mercury Cougar vehicles with this problem

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