2008 MERCURY GRAND MARQUIS User Comment / Complaint

False acceleration of 2008 mercury grand marquis. on oct. 9th, my wife and i and two friends (from pa and de) were in vehicle headed for dinner. cranked vehicle after setting for approximately 22 hours. engine revved up to an estimated 4000 rpm created loud rumbling sound and vibrated vehicle. i was too frightened to look at tachometer. turned switch key off. made 3 attempts to start engine. finally removed key for approximately 10 to 15 seconds, car started and seemed normal. problem has not reoccurred, however my wife will not drive vehicle. frankly all four people in car had a ¿!@#$% frightening. this took place in oak ridge tn. on oct. 9, 2007. oct.10 drove vehicle to lincoln-mercury dealer in oak ridge. they stated that if the engine service light did not come on, they would not be able to find any problem. on oct. 19 vehicle was taken to island lincoln/mercury dealer in merritt island fl. (vehicle was purchased there.) service manager drove vehicle on test drive and told me in a nice manner that i must have had my foot on the brakes and gas pedal at same time. not true. i have tested starting this vehicle several times with one foot on brake and other foot on gas pedal. engine revs up normally, no rumbling what so ever. the rumbling caused me to believe that some cylinders were not firing during this event. dealer did not make any attempt to find or duplicate problem. names of telephones numbers of other passengers are available.