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1991 Mercury Marquis 5.0L Misfire
Posted to Ford Driveability on 4/21/1998

Hello,

This car has a lean misfire off idle and up. Add propane mis [...] waveform has extreme osilations in the firing line off idle. Indicating something vary wrong. Cylinder power balence really doesn,t show any one cylinder bad. The O2 sensors do vary. th...

 
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car Vehicle Data

1991 Mercury Marquis

VIN 2MEC75FXMX
Engine5.0 L / 8 cyl
SymptomsMisfire
OccursAlways, Under Load
Message Closed

car Vehicle Data

1991 Mercury Marquis

VIN 2MEC75FXMX
Engine5.0 L / 8 cyl
SymptomsMisfire
OccursAlways, Under Load