1998 MERCURY MARQUIS WITH 93,000 MILES.
SEEMS TO START ON ONE CYLINDER AND WORKS IT'S WAY UP TO ALL CYLINDERS FIRING. THEN ENGINE RACES THEN BACKS OFF TO NORMAL.
THIS ONLY HAPPENS WHEN CAR SITS FOR ABOUT 12 HOURS BOTH SUMMER AND WINTER. ALL STARTS AFTER INITIAL START ARE NORMAL
Optional Information:
1998 Mercury marquis 4.6
Already Tried:
changed fuel filter
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