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High idle and cruise control will not work - Grand Marquis Mercury Cars & Trucks

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Check for vacuum leaks. While car is running you will hear hissing sound from broken vacuum line. This will also prevent cruise control from working or will cause it to floor the gas pedal when activated.

Posted on Dec 25, 2013

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Vaccuum leakbbbbbbbbbbbbbbbbbbb

Posted on Dec 25, 2013


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