{"nhtsa_id":604763,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-05-12","date":"1999-03-08","document_id":"9947","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE; ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"ENGINE EXPERIENCING ROUGHNESS AT IDLE DUE TO EXHAUST SYSTEM RESONANCE. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/604763","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"CROWN VICTORIA","year_from":1997,"year_to":1999,"match":"exact","vehicle_ids":["1997_ford_crown-victoria","1998_ford_crown-victoria","1999_ford_crown-victoria"]},{"make":"LINCOLN","model":"TOWN CAR","year_from":1997,"year_to":1999,"match":"exact","vehicle_ids":["1997_lincoln_town-car","1998_lincoln_town-car","1999_lincoln_town-car"]},{"make":"MERCURY","model":"GRAND MARQUIS","year_from":1997,"year_to":1999,"match":"exact","vehicle_ids":["1997_mercury_grand-marquis","1998_mercury_grand-marquis","1999_mercury_grand-marquis"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}