2005 Mercury Marquis Rough running at 45-50 MPH

2005 MERCURY MARQUIS
91,000 MILES • V8 • 2WD • AUTOMATIC
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MAJOR15
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My problem is between 45-50 MHP the car stutters and skips when the RPM's are low. If I accelerate normal or slower the problem occurs. If I accelerate quickly the car does not miss a beat.

I have replace a fuel filter, run a bottle of techtron and spark plugs in attempts to fix this problem. I have no check engine lights.
Jun 28, 2009 at 12:09 PM
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DOCFIXIT
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Hi Try driving with OD off see what happens.
Let me know
Thanks for donate
Jun 28, 2009 at 1:51 PM
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MAJOR15
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[quote:bbbf8a9fb3="Major15"]Engine Performance problem
2005 Mercury Marquis V8 Two Wheel Drive Automatic 91000 miles

My problem is between 45-50 MHP the car stutters and skips when the RPM's are low. If I accelerate normal or slower the problem occurs. If I accelerate quickly the car does not miss a beat.

I have replace a fuel filter, run a bottle of techtron and spark plugs in attempts to fix this problem. I have no check engine lights.[/quote:bbbf8a9fb3]

I drove it with OD off and the problem did not occur. I have noticed some rough idling every 3rd or 4th stop.
Jun 29, 2009 at 4:42 PM
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DOCFIXIT
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O.K. shuttering coming from transmission the lock-up torque convertor and/or the solenoid. Rough idle another problem
Jun 30, 2009 at 1:23 PM