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2004 Mercury Grand Marquis LS 4.6L Misfire
Posted to Ford Driveability on 1/27/2010 15 Replies

misfire at idle,cyl#6. Needed plugs, boots and fuel service(done). Still misfiring. Swapped all w/cyl#5, still misfire on 6. Compression on #5 and 6 good at about 115psi. Bank #2 sensor 1 lean, can be forced rich. Sprayed cleaner at intake, no change. Engine v...

15 Replies Received (View Replies)

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car Vehicle Data

2004 Mercury Grand Marquis LS

VIN 2MEFM75W54
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire
OccursAlways
Message Closed w/FIX

car Vehicle Data

2004 Mercury Grand Marquis LS

VIN 2MEFM75W54
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire
OccursAlways