2005 Mercury Marquis Rough running at 45-50 MPH

Tiny
MAJOR15
  • MEMBER
  • 2005 MERCURY MARQUIS
  • V8
  • 2WD
  • AUTOMATIC
  • 91,000 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.
Sunday, June 28th, 2009 AT 12:09 PM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi Try driving with OD off see what happens.
Let me know
Thanks for donate
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Sunday, June 28th, 2009 AT 1:51 PM
Tiny
MAJOR15
  • MEMBER
  • 2 POSTS
I drove it with OD off and the problem did not occur. I have noticed some rough idling every 3rd or 4th stop.
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Monday, June 29th, 2009 AT 4:42 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
O.K. Shuttering coming from transmission the lock-up torque convertor and/or the solenoid. Rough idle another problem
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Tuesday, June 30th, 2009 AT 1:23 PM

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