» Problem With Idle Air Bypass Valve May Cause Engine Performance Problems
Report: Problem With Idle Air Bypass Valve May Cause Engine Performance Problems
Mercury Cougar Problem
Model Year Affected: 1990
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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