Having problems with your 1996 Mercury Grand Marquis ?

1996 mercury grand marquis makes sucking or blowing air sound when I turn the car off

Posted / edited by AnonymousUser on : 14-01-2019

Answers :

Have the throttle body valve cleaned and the idle speed control valve cleaned, they get full of gunk from combustion blowback and this restricts the airflow through them and that will cause noise on shutdown of the engine.
Repair Help & Product Troubleshooting for 1996 Mercury Grand Marquis

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