Engine Performance problem
2006 Lincoln Navigator V8 Four Wheel Drive Automatic 68,450 miles
My 2006 Lincoln Navigator is misfiring; a week ago I accidentally put in approximately a 1/2 gallon of regular, upon realizing my mistake I immediately changed to the premium that I usually use. I'm sure that fuel has burned out by this point. At any rate,
I took the car for its 60,000 mile service, and had my spark plugs changed but the vehicle is still misfiring. Any suggestions?
Saturday, October 31st, 2009 AT 7:47 AM