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2004 Mercury Grand Marquis GS 4.6L Bucking
Posted to Ford Driveability on 1/26/2017 23 Replies

sometimes when u start out cold runs great and warms it start bucking for no reason .ran for codes no codes so I unplug mass air flow .. runs great so I replaced mass air flow same problem once I put it in. long fuel trims run about -7-13 sometime spray around...

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  Related Documents & Media  2004 Mercury Grand Marquis GS

 
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car Vehicle Data

2004 Mercury Grand Marquis GS

VIN 2MEFM74W64
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsBucking
OccursAlways
Message Closed w/FIX

car Vehicle Data

2004 Mercury Grand Marquis GS

VIN 2MEFM74W64
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsBucking
OccursAlways