Mercury Marquis Engine Idle Rough

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Rough Idle On Cold Starts

2000 MERCURY MARQUIS

Once Engine Warms Up Seems To Run Fine. I’ve Replaced Iac, Spark Plugs (coppers), Fuel Filter, And O2 Sensors. I Will Sometimes Get Lean...

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Asked by mgoblue78

1992 Mercury Marquis Overnight Engine Change...rough...

1992 MERCURY MARQUIS

A 1992 Mercury Grand Marquis ~100,000 Miles. Engine Was Running Perfectly. I Brought My Car In For Annual Inspection. Asked That The Oil Be...

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Asked by Barry Larose

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Backfire Burning Oil Compression Gas Hard to Start Hesitate Idle Erratic Idle High Idle Low Idle Rough Knock Lean Locked Up Loud Low Power Misfire Noise Not Cranking Over Not Running Oil Leak Overheat Poor Mileage Rattle Revs Up Runs Hot Runs Rough Shakes Smell Sputter Stall While Driving Stall at Idle Surge Tap Tick Vacuum Leak Vibration Whine

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